Originally Posted by Culvert

Just a quick question about oil here? I was talking with service Mgr this week aswell and dropped of Chevron Delo 400LE 5-40syn oil and they said I should stick with the Motorcraft oil. Only reason he mentioned was the heavier 15-40 oil is better for the pressure build up in the injectors. That 5-40 is to light of an oil??

Anyone have input on this?