Originally Posted By: justinbrum
My engine builder said to use a quality 5w40 grade oil. I've ran some Castrol gtx for break in but now I'm looking to pour in some good stuff.it's a weekend toy that I take to the track. I'm looking at the Pennzoil ultra platinum 5w40 I run a Wix Racing filter as its the only one I've found that fits my remote mount oil filter housing. With the amount of use I'm looking for a once a year oil change
We recommend using Shell Rotella T6 5W-40 Full Synthetic. It’s rated for gasolines and it is formulated with 1200 ppm of zinc which is ideal for today’s Gen 4 iron block performance engines as well as older flat tappet engines. It targets high temperature and high-wear surfaces where they are needed the most. - The Shell Rotella Team
