# Additives - URL: https://www.gt2i.com/en/19411956/additives ## Description At GT2i, you will find a wide selection of car additives designed to improve your engine's performance, extend the life of your mechanical components and ensure your vehicle runs smoothly, both on the road and on the circuit. The additives we offer meet a wide range of needs: cleaning the injection circuit, protecting against wear, improving combustion, reducing smoke, and treating engine oil and fuel. Each automotive additive acts as a true ally in preserving your engine's performance while reducing internal fouling and friction. GT2i offers technical solutions tailored to the demands of motor racing and everyday vehicles. Whether for a petrol or diesel engine or even a cooling system, our additives meet the highest quality standards. A good automotive additive can make all the difference: reduced fuel consumption, smoother engine, drop in mechanical noise, better acceleration response, etc. Preserve the mechanics and optimize the performance of your vehicle thanks to GT2i's expertise. See also: Threadlocker, Cleaning Product, Lubricant, Miscellaneous Products. ## Subcategories ## Products - [Motul diesel cetane booster 300ml](https://www.gt2i.com/en/miscellaneous-cleaning-products/153343-booster-de-cetane-diesel-motul-300ml-3374650270661.html): €13.80 - [Motul gearbox cleaner 500ml](https://www.gt2i.com/en/miscellaneous-cleaning-products/153348-motul-gearbox-cleaner-500ml-3374650261829.html): €23.60 - [Castrol Engine Shampoo engine cleaner 0.3L](https://www.gt2i.com/en/additives/156674-castrol-engine-shampoo-engine-cleaner-03l-3661768836361.html): €62.40 - [Additive for Automatic Transmission / ATF - 250ml](https://www.gt2i.com/en/liquides-de-refroidissement/185242-additive-for-automatic-transmission-atf-250ml-3666618290911.html): €14.40 - [Motul radiator stop leak 300ml](https://www.gt2i.com/en/miscellaneous-cleaning-products/153341-motul-radiator-stop-leak-300ml-3374650276069.html): €12.80 - [Motul engine stop leak 300ml](https://www.gt2i.com/en/miscellaneous-cleaning-products/153340-stop-fuite-moteur-motul-300ml-3374650323688.html): €19.20 - [VP Racing - ethanol fuel stabilizer (59mL)](https://www.gt2i.com/en/additives/138885-vp-racing-fuel-stabiliser-with-ethanol-shield-237ml-846781001108.html): €18.30 - [VP Racing - Power Boost additive (473mL)](https://www.gt2i.com/en/additives/138886-vp-racing-power-boost-473ml-846781000521.html): €19.10 - [VP Racing - fuel system cleaner (473mL)](https://www.gt2i.com/en/additives/138887-vp-racing-fuel-system-cleaner-473ml-846781000538.html): €19.10 - [VP Racing - Octanium gasoline additive approx.1L (946mL)](https://www.gt2i.com/en/additives/138889-vp-racing-octanium-gasoline-additive-approx1l-946ml-846781001047.html): €31.80 - [VP Racing - Cetanium diesel additive approx.1L (946mL)](https://www.gt2i.com/en/additives/138890-vp-racing-cetanium-946ml-846781001061.html): €31.80 - [VP Racing - Octanium unleaded fuel additive approx.1L (946mL)](https://www.gt2i.com/en/additives/138891-vp-racing-octanium-unleaded-946ml-846781006141.html): €31.80 - [VP Racing - Cool Down additive 473mL](https://www.gt2i.com/en/additives/138892-vp-racing-cool-down-473ml-846781003058.html): €18.30 - [Motul 300ml cat converter cleaner](https://www.gt2i.com/en/miscellaneous-cleaning-products/153339-nettoyant-pot-catalytique-motul-300ml-3374650320328.html): €12.90 - [MOTUL 300ml diesel injection maintenance product](https://www.gt2i.com/en/additives/200113-motul-300ml-diesel-injection-maintenance-product-3374650422039.html): €13.90 - [MOTUL 300ml petrol injection cleaner](https://www.gt2i.com/en/additives/200115-motul-300ml-petrol-injection-cleaner-3374650422008.html): €13.10 - [ECOTEC QUICK-PUR 125ml](https://www.gt2i.com/en/additives/201098-ecotec-quick-pur-125ml-3666618602370.html): €22.00 - [ECO 85+ ECOTEC special treatment for ethanol 500ml](https://www.gt2i.com/en/additives/201099-eco-85-ecotec-special-treatment-for-ethanol-500ml-3666618602387.html): €25.70 - [ECOTEC TCS - Curative treatment for soot 500ml](https://www.gt2i.com/en/additives/201103-ecotec-tcs-curative-treatment-for-soot-500ml-3666618602424.html): €25.50 - [ECOTEC CLIM-NET 125ml](https://www.gt2i.com/en/additives/201106-ecotec-clim-net-125ml-3666618602455.html): €22.00 - [ECOTEC radiator leak stop 250ml](https://www.gt2i.com/en/additives/201107-ecotec-radiator-leak-stop-250ml-3666618602462.html): €16.80 - [ECO 5 Detox ECOTEC multifunction diesel engine cleaner 1L](https://www.gt2i.com/en/additives/203108-eco-5-detox-ecotec-multifunction-diesel-engine-cleaner-1l.html): €44.90 - [MOTUL Engine Flush 300ml engine cleaner](https://www.gt2i.com/en/additives/203602-motul-engine-flush-300ml-engine-cleaner-3666618664507.html): €10.90 - [White maintenance spray - 250 ml](https://www.gt2i.com/en/additives/185276-white-maintenance-spray-250-ml-3666618291253.html): €2.72 - [3-Pack VP Racing Octanium Gasoline Additive](https://www.gt2i.com/en/additives/1006120-3-pack-vp-racing-octanium-gasoline-additive.html): €86.40 - [ECOTEC Diesel Performance Booster 300ml](https://www.gt2i.com/en/additives/32237-ecotec-diesel-performance-booster-300ml-3549680011182.html): €29.50 - [ECOTEC Top Clean Diesel Injection Cleaner 300ml](https://www.gt2i.com/en/additives/32445-ecotec-top-clean-diesel-injection-cleaner-300ml-3549680011113.html): €36.60 - [Bardahl Lead Substitute 250ml](https://www.gt2i.com/en/additives/34570-bardahl-lead-substitute-250ml-3661768824306.html): €17.50 - [ECOTEC Turbo Net cleaner to clean the EGR valves / boost 125ml](https://www.gt2i.com/en/additives/36349-ecotec-turbo-net-cleaner-to-clean-the-egr-valves-boost-125ml-3549680011045.html): €38.00 - [Red Line Limited Slip Friction Modifier LSD 118Ml](https://www.gt2i.com/en/additives/38659-red-line-limited-slip-friction-modifier-lsd-118ml-3661768119211.html): €17.00 - [Silkolene Gasoline Additive | PRO BOOST Octane Booster 1 L](https://www.gt2i.com/en/additives/38736-silkolene-gasoline-additive-pro-boost-octane-booster-1-l-5031131337500.html): €35.10 - [ECOTEC MOS 2 treatment gearboxes / axles 50ml tube](https://www.gt2i.com/en/additives/42269-ecotec-mos-2-treatment-gearboxes-axles-50ml-tube-3549680011229.html): €19.40 - [BARDAHL Cleaner for Nozzles Fuel Engines 500ml](https://www.gt2i.com/en/additives/3193-bardahl-cleaner-for-nozzles-fuel-engines-500ml-3266720111984.html): €41.50 - [BARDAHL Octane Booster Treatment / Additive 500 ml](https://www.gt2i.com/en/additives/3194-bardahl-octane-booster-treatment-additive-500-ml-3266720123024.html): €25.90 - [Treatment / Additive BARDAHL Anti-wear Gearbox 150ml](https://www.gt2i.com/en/additives/3657-treatment-additive-bardahl-anti-wear-gearbo-150ml-3266720010454.html): €37.00 - [ECOTEC oil circuit cleaner before oil change 250ml](https://www.gt2i.com/en/additives/18951-ecotec-oil-circuit-cleaner-before-oil-change-250ml-3549680010246.html): €23.90 - [ECOTEC injector/fuel system cleaner 250ml](https://www.gt2i.com/en/additives/18953-ecotec-injector-fuel-system-cleaner-250ml-3549680010000.html): €20.60 - [ECOTEC petrol booster 300ml](https://www.gt2i.com/en/additives/18954-ecotec-petrol-booster-300ml-3549680011083.html): €29.50 - [ECOTEC T2S oil treatment 100ml](https://www.gt2i.com/en/additives/18955-ecotec-t2s-oil-treatment-100ml-3549680010253.html): €35.70 - [ECOTEC engine leak stop 250ml](https://www.gt2i.com/en/additives/29148-ecotec-engine-leak-stop-250ml-3549680010215.html): €22.40 - [ECOTEC T2S oil treatment 500ml](https://www.gt2i.com/en/additives/43426-ecotec-t2s-oil-treatment-500ml-3549680040250.html): €105.00 - [Motul Octane Booster Additive 300ml](https://www.gt2i.com/en/additives/78076-motul-octane-booster-additive-300ml-3374650322841.html): €14.20 - [WARM UP® Gold Formula Additive 250mL](https://www.gt2i.com/en/additives/78180-warm-up-gold-formula-additive-250ml-3770001129006.html): €31.90 - [WARM UP® Gold Formula Gearbox Additive 150mL](https://www.gt2i.com/en/additives/78182-warm-up-gold-formula-gearbox-additive-150ml-3770001129808.html): €36.00 - [WARM UP® Octane Booster +6 points Additive 375mL](https://www.gt2i.com/en/additives/78183-warm-up-octane-booster-6-points-additive-375ml-3770001129785.html): €30.20 - [Ecotec Top Clean Cleaner for Fuel Injection 300ml](https://www.gt2i.com/en/additives/47223-ecotec-top-clean-cleaner-for-fuel-injection-300ml-3549680011014.html): €36.60 - [ECOTEC DI-ELECTRIC + 400ml](https://www.gt2i.com/en/additives/47227-ecotec-di-electric-400ml-3549680010499.html): €22.70 - [ECOTEC cleaner for gas oil circuit 250ml](https://www.gt2i.com/en/additives/50889-ecotec-cleaner-for-gas-oil-circuit-250ml-3549680010109.html): €20.60 - [ECOTEC cooling system cleaner 250ml](https://www.gt2i.com/en/additives/50891-ecotec-cooling-system-cleaner-250ml-3549680010314.html): €19.10 - [ECOTEC leak-preventer gearbox / power assisted steering 30ml](https://www.gt2i.com/en/additives/51904-ecotec-leak-preventer-gearbox-power-assisted-steering-30ml-3549680010239.html): €21.30 - [BARDAHL Cleaner for Nozzles Diesel Engines 500ml](https://www.gt2i.com/en/additives/65392-bardahl-cleaner-for-nozzles-diesel-engines-500ml-3266720011550.html): €33.20 - [ECOTEC START+ 400ml](https://www.gt2i.com/en/additives/69978-ecotec-start-400ml-3661768475874.html): €14.60 - [ECOTEC S2AS oil treatment 300ml](https://www.gt2i.com/en/additives/78307-ecotec-s2as-oil-treatment-300ml-3661768598283.html): €36.70