# calling all LS1 owners... **URL:** https://forums.speedlife.net/t/calling-all-ls1-owners/244753 **Category:** Shift518 Automotive **Created:** [June 14, 2009, 4:13pm UTC](https://forums.speedlife.net/t/calling-all-ls1-owners/244753 "2009-06-14T16:13:16Z") **Posts on this page:** 1 **Showing post:** 27
### Author: ![Shady](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@Shady](https://forums.speedlife.net/u/Shady) #### Post date: [June 15, 2009, 8:39am UTC](https://forums.speedlife.net/t/calling-all-ls1-owners/244753/27 "2009-06-15T08:39:19Z")
> [@Just ordered the new tires for my truck](https://forums.speedlife.net/t/just-ordered-the-new-tires-for-my-truck/15378/12): > > you’d rather worry about inadequate flow or rediculous pressures due to tighter clearances? > > on second thought you prolly don’t have to worry because your car is a billion years old. All my old shit i run thick oil in too, but the new shit it’s really not required and will cause excess friction and loss of the all important HPs! yea I suppose… On another note Try 5w40… not sure how much differant it is from 5w30 but Im running amsoil 5w40 in the z and seems to burn way less oil than it did with 5w30 --- _[View the full topic](https://forums.speedlife.net/t/calling-all-ls1-owners/244753)._