# Swithing BACK to conventional oil from synthetic **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [December 21, 2006, 5:29am UTC](https://forums.speedlife.net/t/swithing-back-to-conventional-oil-from-synthetic/21952 "2006-12-21T05:29:20Z")\ **Posts on this page:** 1\ **Showing post:** 29
**Author:** ![Garick](https://avatars.discourse-cdn.com/v4/letter/g/8797f3/32.png) [@Garick](https://forums.speedlife.net/u/Garick)\ **Post date:** [December 21, 2006, 6:25pm UTC](https://forums.speedlife.net/t/swithing-back-to-conventional-oil-from-synthetic/21952/29 "2006-12-21T18:25:03Z")
Its my understanding that mobil one isn’t really a ‘true’ synthetic anymore. All oils are formulated with some sort of fairly standard base stock. Mobil one is now on a group III base stock which is a further refined mineral oil. There is some FTC law that still allows it to be called synthetic. Its still a good oil but not technically synthetic. Amsoil and older formulations of mobil one are true synthetics With PAO or group IV bases. Redline is a group V ester base. Check out [http://bobistheoilguy.com/](http://bobistheoilguy.com/) for all you could ever want to know about oil. I Use amsoil in my car and leave it for about 10k miles…95% of my driving is extremely easy. They claim its good to 25k but that seems a little outrageous. --- _[View the full topic](https://forums.speedlife.net/t/swithing-back-to-conventional-oil-from-synthetic/21952)._