I ordered this box of 12 quarts on Tuesday, got it today which is impressive since I live north of the border and that only took 3 days. Mary was a pleasure to deal with, I wanted two different types and she had no problem sending the mixed order across while also looking for a cheaper shipping option. Service like this builds a lifetime customer!
Anyway, I normally prefer a thicker oil in the summer while towing, hence the 5w-30 no vii, but I'm hearing a slight knock on a cold start at idle which the dealer said "is normal" and another mechanic said "change your oil back to spec and we'll listen again". So here I am, I'll be running the 5w-20 for the winter where its just on passenger car duty but will move back to the no vii 5w-30 for next summer (more than likely as I have no faith in the oil being the issue) when RV season picks up again. Worth mentioning that the noise I hear has been there probably since new, and has done it on several different oil brands (just want to be clear that I'm not suggesting the noise is due to HPL, the mechanic is concerned about the weight itself not the formula).
During a hot idle there is no sound whatsoever, it's buttery smooth. It's not an exhaust leak, this is more of a knock and less of a tick. My guess is piston slap?
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