- Jan 30, 2007
- Clovis, CA
I ran across this page while web surfing. I thought it was interesting that they recommend 15W-40 from the very first turn of the key as opposed to SAE 30:
Engine oil requirements (June 06, 2007) In recent years, auto manufacturers have switched to roller camshafts for performance and fuel economy reasons. This combined with the EPA requirements for reduced emissions, has led to the reduction of zinc diakyl dithiophosphate (ZDDP). This lower zinc content will not properly lubricate the flat tappet hydraulic lifters we use on the majority of our engines. Comp Cams has come out with a recent study indicating oils designed for diesel engines still have the higher zinc content. These oils have a service rating of CI4 and are of a 15W40 weight. Our independent testing agrees with Comp Cams findings. Therefore, we are recommending SHELL ROTELLA oil with a 15w40 weight for initial start up and during the break in period of your Blueprint engine. After the critical break in period, synthetic oils such as Royal Purple can be used. Alternate brands that have the CI4 service rating can also be used.