I never have put all synthetic oil in my jeep. Althoug I will replace one quart of regular oil with Castrol syntec motor oil to help increase engine life. this also reduces cost of having to purchase full synthetic motor oils. This is a great product to keep your engine running strong for years along with proper maintenance.

themance

USA

Castrol Syntec Motor Oil, have actually used this in other cars some years ago, but recently went back to using this brand of oil as I had better performance and more power in my old 1980 toyota corolla that car had over 200,000 miles on it and still was running very well when I sent it to the junk yard. Now it is 2010 and just bought a 2000 ford mustang and will be going back to using Castrol Syntec oil again, was always pleased with performance with Castrol Syntec, the toyota's engine always had less deposits and never burned the oil like it did with conventional oils, ran cleaner, smoother and more powerful. I highly recommend this synthetic oil to all and there is a big plus, not so many frequent oil changes as conventional oils which you have to do at 3000 miles, Castrol Syntec 5000 mile intervals instead, saving you more money and saving the life of your engine. Castrol SYNTEC's unique and proprietary formula helps your vehicle maintain maximum horsepower by reducing harmful deposit formation Castrol SYNTEC delivers: An advanced additive package that neutralizes corrosive particles, preventing them from grouping together and forming power-robbing deposits. Stability and endurance under extreme conditions (heat, load, speed) that can cause conventional oils to break down. Superior engine protection that outperforms leading conventional and synthetic blend oils, passing severe industry torture tests.

angel2485

Rosamond, CA