35,000+ results for additive
- Lubegard Transmission Fluid Additive Instant Shudder Fixx (12 Tubes)Opens in a new window or tabBrand New$99.99Free 2-4 day shippingSponsoredmarvelautomotive (1,038) 98.4%
- TriboTEX Oil Additive: Treatment for Engine & Oil Automotive, with NanoparticlesOpens in a new window or tabFACTORY DIRECT - OIL ADDITIVEBrand New$97.99Free shippingFree returns704 soldSponsoredtribotex (2,409) 99.7%
- BG 44K PLATINUM Fuel System Cleaner Additive 11oz Can PN 208 Free Funnel 12 PackOpens in a new window or tabBrand New$229.00Free shippingSponsoredSave up to 5% when you buy moredistinctyachts (1,619) 99.5%
- REV X ZDDP Zinc & Phosphorus (5) - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$39.95Free 2-4 day shippingFree returns1,643 soldSponsoredTop Rated Plusrevxoil (3,451) 99.4%
- Lucas Oil 10003 Fuel Injector Cleaner 1 Quart Automotive Additive FAST SHIPPINGOpens in a new window or tabBrand New$11.18Free shipping466 soldSponsored166auto (4,766) 99%
- REV X ZDDP Zinc & Phosphorus - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$11.95Free 2-4 day shippingFree returns1,712 soldSponsoredSave up to 27% when you buy moreTop Rated Plusrevxoil (3,451) 99.4%
- ZDDPlus ZDDP Engine Oil Additive Restores Zinc Every Oil Change. 5 Pack DiscountOpens in a new window or tabBrand New$39.74Free shippingFree returns1,441 soldSponsoredTop Rated Plusoldbuickparts (34,180) 99%
- Lucas Oil 10063, TB Zinc-Plus Engine Break-In Oil Additive, 16 OZ. BottleOpens in a new window or tabBrand New$15.86Free shippingFree returns887 soldSponsoredTop Rated Plusrace_choice (22,698) 99.7%
Picked For You
Sponsored | Top selling items from highly rated sellers with free shipping- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$14.99Free shippingAlmost gone27 soldSponsoredSave up to 5% when you buy moreuzmshahi_0 (88) 100%
- DT 550 Friction Reducer Oil Additive, 16 Oz. Pint, Free Shipping!Opens in a new window or tabBrand New$26.99Free shipping67 soldSponsoredthe_warehousing_center (658) 99.3%
- Yamaha Yamalube ACC-RNGFR-PL-12 Ring Free Plus Fuel AdditiveOpens in a new window or tabBrand New$21.76Free shipping236 soldSponsoredjorgensenpowersports (5,651) 99.1%
- Lucas 10063 TB Zinc-Plus Engine Break-In Oil Additive High-Zinc 16 Oz. (Qty 1)Opens in a new window or tabBrand New$15.89Free shipping117 soldSponsored166auto (4,766) 99%
- BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 Free ShippingOpens in a new window or tabBrand New21 product ratings - BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 Free Shipping$23.15Free shippingFree returns1,336 soldSponsoredTop Rated Plushorsesntorque (1,929) 99.9%
- Doc's Diesel THE DIESEL TREATMENT Diesel Fuel Additive (16oz) Squeeze BottleOpens in a new window or tabBrand New$23.99Free shipping103 soldSponsoredSave up to 12% when you buy moredocsdiesel (1,816) 98.9%
- HAPCO - 1 Gallon Lead Substitute Fuel Additive - TREATS UP TO 200 GALLONSOpens in a new window or tabBrand New$78.49Free 2-4 day shippingFree returns123 soldSponsoredSave up to 20% when you buy moreTop Rated Plushapco-products (2,080) 96%
- XADO 1 Stage Maximum Engine Oil Additive - Protects Engine from Wear and TearOpens in a new window or tabOriginal XADO Direct US Seller IN STOCK Fast ShippingBrand New$49.49Free shipping117 soldSponsoredSave up to 15% when you buy morexado_us (1,800) 98.8%
- 2 PACKS Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive/Opens in a new window or tabBrand New16 product ratings - 2 PACKS Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive/$27.00Free shipping10 watchersSponsoredaudi-1557 (9) 76.5%
- Comp Cams 159 12 oz Engine Zinc ZDDP Break-In Oil Additive LubeOpens in a new window or tabBrand New$19.99Free shippingFree returnsAlmost gone1,574 soldSponsoredTop Rated Plusamsracing (44,810) 99.8%
- Genuine GM ACDelco Limited Slip Axle Lubricant Additive 4oz 88900330Opens in a new window or tabBrand New$11.95Free shipping577 soldSponsoredSave up to 5% when you buy morehga_performance (30,683) 98.8%
- Genuine OEM Toyota 00289-EFI34 Fuel EFI Tank Additive 6.76 Fl OzOpens in a new window or tabBrand New$19.99Free shippingSponsoredcarpartsurplus (895) 99.9%
- Archoil AR9100 16oz Friction Modifier - Oil Additive - PowerStroke FixOpens in a new window or tabFAST AND FREE SHIPPING DIRECT FROM ARCHOILBrand New$44.95Free shipping4,382 soldSponsoredarchoil (6,534) 99.8%
- 2X ZDDPlus ZDDP Engine Oil Additive Restores Zinc Every Oil Change | 2 BottlesOpens in a new window or tabBrand New$26.99Free shippingFree returnsSponsoredTop Rated Plusoldbuickparts (34,180) 99%
- New ListingSTP Super Concentrated DIESEL SULFUR SUBSTITUTE Fuel Additive 12 FL oz Made USAOpens in a new window or tabBrand New$16.99Free shippingFree returnsSponsoredcaki-5 (506) 100%
- New ListingLiqui Moly 20004 Hydraulic Lifter Additive- 300ML Reduces hydraulic tappet noiseOpens in a new window or tabBrand New$15.99Free shippingSponsoredpartscb6 (0) 0%
- Gumout Fuel Injector Cleaner/Carb Cleaner Additive 6 oz - 510021W ( Pack of 2 )Opens in a new window or tabBrand New$8.99Free shipping12 soldSponsoredSave up to 5% when you buy morecl53-69 (888) 98.8%
- Oil Additive-Friction Modifier Nano Energizer,Engine RestorationOpens in a new window or tabBrand New$24.99Free shippingSponsoredpino216 (481) 100%
- BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 2 PackOpens in a new window or tabBrand New$41.95Free shipping488 soldSponsoredSave up to 5% when you buy morehorsesntorque (1,929) 99.9%
- tribotex oil additiveOpens in a new window or tabBrand New$85.00+$4.38 shippingLast one4 watchersSponsoredseanbenton32 (219) 100%
- BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 - 5 PackOpens in a new window or tabBrand New$95.50Free shipping319 soldSponsoredSave up to 10% when you buy morehorsesntorque (1,929) 99.9%
- Lucas Oil 10013 Fuel Treatment Additive, 1 Gallon, Case Of 4Opens in a new window or tabOxygen Sensor Safe, 4 gallons Volume, Unscented ScentBrand New$123.96List price: $142.5513% offFree 3 day shipping72 soldSponsoredspeedway_motors (303,175) 99.5%
- HAPCO - 32 oz. Lead Substitute Fuel Additive - TREATS UP TO 50 GALLONSOpens in a new window or tabBrand New$34.99Free 2-4 day shippingFree returns126 soldSponsoredSave up to 40% when you buy moreTop Rated Plushapco-products (2,080) 96%
- Opti-Lube XL Xtreme Lubricant Diesel Fuel Additive: 1 Gallon without AccessoriesOpens in a new window or tabBrand New$67.76Free shipping226 soldSponsoredopti-lube (446) 99.1%
- Lucas Oil 10278 Engine Oil Stop Leak -32 Ounce Quart Automotive Additive 2 PoundOpens in a new window or tabBrand New$11.98Free shippingLast one1 watchersSponsoredcompetitivelegionsllc (189) 98%
- BG MOA Engine Oil Supplement Motor Oil Additive 110 -- Fast Free Shipping!!Opens in a new window or tabNew (Other)$17.85Free shipping322 soldSponsoredSave up to 5% when you buy moredistinctyachts (1,619) 99.5%
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$11.99Free shipping6 watchersSponsoredw46vm_90 (19) 90.9%
- Wax Additive - 4 oz Surfacing Agent for use with Gelcoat and Polyester resinsOpens in a new window or tabBrand New$16.99Free shippingFree returns1,005 soldSponsoredfiberglasssupplydepot (8,390) 99.9%
- Liqui Moly Hydraulic Lifter Additive LM20004 (2) 300ml Cans 10.14 oz.ea.Opens in a new window or tabBrand New$23.90Free shipping382 soldSponsoredimpart1731 (73,576) 99%
- REPACKAGED Mobius & Kluber Watchmaking Oils & Greases - USA SELLEROpens in a new window or tabNew (Other)$5.99 to $99.99+$4.36 shippingSponsoredds_watch_shop_and_supply (1,061) 100%
- Lubegard Transmission Fluid Additive Instant Shudder Fixx (2 fl oz. Tube)Opens in a new window or tabBrand New$14.99Free 2-4 day shippingSponsoredmarvelautomotive (1,038) 98.4%
- XADO Diesel Truck - Engine Repair Wear Protection Engine Oil Additive TreatmentOpens in a new window or tabOriginal XADO Direct USA FAST&FREE ShippingBrand New$129.90Free shippingFree returns68 soldSponsoredSave up to 15% when you buy moreTop Rated Plusxado_us (1,800) 98.8%
- G.M. LIMITED SLIP ADDITIVE PT # 88900330 (10-4003) (REPLACEMENT FOR 1052358)Opens in a new window or tabBrand New$12.50Free shippingFree returns1,102 soldSponsoredfire5auto (39,666) 99.6%
- New ListingAdvanced Friction Technologies RK-44 Oil Additive 16 fl ozOpens in a new window or tabBrand New$10.00+$6.44 shippingSponsoredvafor4058 (398) 99.3%
- FLITZ Tumbler Media Additive 7.6oz/225ml Bottle TA04885 (SEE VIDEO)Opens in a new window or tabBrand New$16.95Free shipping81 soldSponsoredscgra33 (2,313) 99.8%
- REV X ZDDP Zinc & Phosphorus (2) - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$22.95Free 2-4 day shippingFree returns362 soldSponsoredSave up to 30% when you buy moreTop Rated Plusrevxoil (3,451) 99.4%
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$12.85Free shippingFree returnsLast one12 soldSponsoredprism_inc (129) 98.5%
- System 48 Engine AdditiveOpens in a new window or tabBrand New$2.00+$7.57 shippingSponsoredcheput55 (21) 100%
- Flood Penetrol Oil-Based Paint Additive Conditioner, 1 Qt. FLD4 04 FloodOpens in a new window or tabBrand New$21.43Free shippingSponsoredtrimaxstore (8) 90%
- New ListingSea Foam ST20 Truck and SUV Motor Treatment Additive, 20 ozOpens in a new window or tabBrand New$11.10Free shippingfrom Sri LankaSponsoredchamardilha-0 (12) 92.3%
- ZMAX Multi-Purpose Formula Engine, Transmission & Fuel Additive 3 PackOpens in a new window or tabBrand New$48.99Free shipping11 watchersSponsoredSave up to 15% when you buy moregreatdealtoday (389) 97.7%
- Liqui Moly CeraTec Friction Modifier Oil Additive Protection Ceramic Wear 300MLOpens in a new window or tabBrand New$29.99Free shippingSponsoredautolubegroup1 (23) 100%
- Motul Professional Hydraulic Lifter Care Oil Additive - 300mlOpens in a new window or tabBrand New$19.79Free shippingFree returnsSponsoredTop Rated Plustswarehouse (57,797) 99.7%
- Ford Motorcraft OEM XL3 Friction Modifier Additive Limited Slip DifferentialsOpens in a new window or tabBrand New$13.95Free shippingFree returns1,646 soldSponsoredfire5auto (39,666) 99.6%
- RedLine- Engine Oil Break-In Additive - 16 oz. -PN: 81403Opens in a new window or tabBrand New$22.99Free shippingFree returnsSponsoredTop Rated Plushoerrracing (60,924) 99.6%
- Motul Professional Engine Clean Oil Additive - 300mlOpens in a new window or tabBrand New$18.45Free shippingFree returnsSponsoredTop Rated Plustswarehouse (57,797) 99.7%
- H&C Sharkgrip Slip-resistant Additive 1-LBOpens in a new window or tabBrand New$24.88Free shipping2 watchersSponsoredfabulouz-dealz7 (989) 99.4%
- DR TRANNY LUBEGARD TRANSMISSION INSTANT SHUDDER FIX FIXX SYNTHETIC ADDITIVEOpens in a new window or tabBrand New$11.90Free shipping988 soldSponsoredSave up to 10% when you buy morekressautochris (38,159) 99.8%
- Motul Professional Fuel System Clean Gasoline Additive - 300mlOpens in a new window or tabBrand New$18.49Free shippingFree returnsSponsoredTop Rated Plustswarehouse (57,797) 99.7%
- Ford Motorcraft OEM XL3 Friction Modifier Additive Limited Slip DifferentialsOpens in a new window or tabNew (Other)$13.74Free shippingAlmost gone2,357 soldSponsorednlassupplies (110,525) 98.7%
- Howards Cams Inc Engine Oil Additive 99000; ZPM Break-In, 4oz Cam Break-InOpens in a new window or tabPerformanceParts - Right Parts, Right Price, Right AwayBrand New$15.14Free shipping78 soldSponsoredperformancepartsracing (112,835) 99.6%
- 20g KolorEFX Pearl Pigment Paint Additive for Art Polish Epoxy Resin PlastidipOpens in a new window or tabBrand New$8.49 to $10.49+$5.25 shipping107+ soldSponsoredkolorefx (7,034) 100%
- PVP Industries Quart - 4 cu. ft. Organic Perlite Planting Soil Additive Gi,WhiteOpens in a new window or tabBrand New$38.99Free shippingFree returnsLast one16 soldSponsoredbabys_boutiques (179) 97.4%
- Power Plus 19769-32 Fuel Additive Fuel Fragrance Groovy Grape ScentOpens in a new window or tabBrand New$16.99Free shipping1,946 soldSponsoredSave up to 10% when you buy morenorthbranchsynthetics (13,115) 98%
- BG Products 115 MOA 109 EPR Oil Additive Lubrication & Supplement Engine RestoreOpens in a new window or tabBrand New$34.95Free shipping219 soldSponsoredSave up to 7% when you buy morehorsesntorque (1,929) 99.9%
- Motul Professional Engine Clean Oil Additive - 300ml 10.1ozOpens in a new window or tabNew (Other)$15.00Free shippingSponsoredSave up to 18% when you buy morevelocitybyky (693) 98.9%
- Power Plus 19769-71 Fuel Additive Fuel Fragrance Reefer Madness Scent 4ozOpens in a new window or tabBrand New$13.70Free shipping471 soldSponsoredSave up to 10% when you buy morenorthbranchsynthetics (13,115) 98%
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$16.43Free shippingAlmost gone14 soldSponsoredinfusionkey (917) 99.3%
- Wella Color Toner & Additive 1.42 oz (Pick your color)Opens in a new window or tabBrand New$7.95Free shippingFree returns1,425+ soldSponsoredSave up to 10% when you buy moreTop Rated Plusluv4everbeauty (10,518) 99.5%
- Lucas Oil 10002 Heavy Duty Oil Stabilizer One Gallon Jug Automotive AdditiveOpens in a new window or tabBrand New$32.98Free shippingAlmost gone42 soldSponsored993232maoyi (633) 97.9%
- TriboTEX Small Oil Additive Engine Treatment: Add to Engine Oil - Makes High MilOpens in a new window or tabBrand New$68.99Free shipping76 watchersSponsoredtoolntech (10,441) 96%
- NEW Bar's Leaks Head Seal Blown Head Gasket Repair Additive, 33.8 oz FREE SHIP ✅Opens in a new window or tabBrand New$24.99Free shippingSponsoredSave up to 6% when you buy morerainc0891 (884) 97.3%
- New ListingLight Grey Celtic Sea Salt 1 Pound Resealable Bag–Additive-Free, Gluten-FreeOpens in a new window or tabBrand New$20.99Free shippingSponsoredjeffmanual (133) 100%
- Liqui Moly 20004 Hydraulic Lifter Additive - 300MLOpens in a new window or tabBrand New$17.44Free shipping250 soldSponsoredSave up to 5% when you buy moreforeigndomesticautoparts (68,374) 98.9%
- Genuine Mopar Fluid 4318060AB Limited Slip Additive - 4 oz. BottleOpens in a new window or tabBrand New$11.61Free shippingSponsoredhomeimprovementcapital (225) 98.7%
- Opti-Lube XPD Diesel Fuel Additive: 1 Gallon without AccessoriesOpens in a new window or tabBrand New$82.37Free shipping200 soldSponsoredopti-lube (446) 99.1%
- DT 550 Friction Reducer Oil Additive, 1 Gallon, Free Shipping!Opens in a new window or tabBrand New$107.95Free shipping25 soldSponsoredSave up to 10% when you buy morethe_warehousing_center (658) 99.3%
- Items Per Page