# calling all LS1 owners... **URL:** \ **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:** 38
**Author:** ![Z28LT1Rocket](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/z28lt1rocket/32/6436_2.png) [@Z28LT1Rocket](https://forums.speedlife.net/u/Z28LT1Rocket)\ **Post date:** [June 15, 2009, 6:29pm UTC](https://forums.speedlife.net/t/calling-all-ls1-owners/244753/38 "2009-06-15T18:29:04Z")
> [@Mk4 30R"](#): > > thats some heavy oil for a cold start. 20w50 would be better in africa, not here… use a quality 10w30 or 5w40. i use castrol, but amsoil is awesome. good cal brett. I agree. > [@OFFICIAL Buffalo Sabres Thread](https://forums.speedlife.net/t/official-buffalo-sabres-thread/25170/810): > > ok then I will go with 10w30 > > I need a oil thats going to go well with my high pressure oil pump also. but seriously why do you need need a high pressure oil pump. the only need for that is a motor with extremely high seat pressure valvespring running a hydraulic camshaft. high volume would be better than high pressure but niether are necessary unless yopu have an extremely modified motor (tolerance wise) not bolt ons. id recamend a vacuum pump setup and just use “breather” like other have said, and do believe the problem stems with the hp pump but is noticed after the camshaft swap do to thne extra “aeration” created by the lifters having to travel more in the lifter bore and oil galley. causing extra crank case pressures. --- _[View the full topic](https://forums.speedlife.net/t/calling-all-ls1-owners/244753)._