Richie said

I'm trying to tell a young mechanic about T4 Rotella and to put it in an older truck engine at the shop a 1990 4.0 Jeep six cylinder..Nope that's for diesels only..No way should I be putting that in any gas engine. https://www.amazon.ca/dp/B01LH7L0D0/?tag=joeychgo-20

Is it good or am I the idiot in this argument?

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