So, while on vacation talking to pops he asked if Rotella T 15w40 would be okay for his mildly built 340 in his Dart and the 350 in his 82’ s-10 street/strip truck. I said it should be ok as has lil over 1,000 ppm phosphorus. It’s not SN like Delo and Valvoline are so should be ok right?
Thanks in advance.
Thanks in advance.