You can change over to synthetic right away now. It is old school thinking that tells us not to. Amsoil is by far the best that I have used. I changed my truck over to Amsoil at 40K miles, I finally sold it at 180K miles and no problems other than I had to replace the alt. once. I have changed all m...

Using Amsoil does not cause the leak, the main thing with Amsoil is that it cleans all the carbon deposits left behind that are clogging up you seals. Amsoil constantly cleans as it goes. I changed over to amsoil at 40K and had a leak. I finally sold my truck at 180K with no further leaks. Ran like ...

Using Amsoil actually can save you money because you only have to change the oil every 25K miles or 12 Months. You should save around $50-$60/year this way. The benefit of Amsoil is that it cleans the engine as it is being circulated and gets rid of the carbon deposits in the engine. Check out http:...

Amsoil would not void any manufacturers warranty. It allows you to go up to 25,000 miles or 12 months without changing the oil. It is 100% synthetic unlike most brands that say they are but actually are not. Amsoil just came out with a new oil filter that also only has to be changed every 25,000 mil...