[Verdoro 68]

Originally Posted by locomotivebreath

So that’s the 15w50 sample ? What was your pressures with the 50wt ?

Yes, 15-50. I ran it because that's what Butler recommended. I have a Butler 60 lb pump with a shim and I was seeing the gauge pegged to 80 while cold and while driving. At idle when hot it was 45. My clearances are .020 on the rods and .025-ish on the mains. Normally, I'd be happy with high pressure, but after reading a few threads around here I thought maybe it's unnecessary. I was also wondering if the high pressure was kicking in the filter bypass, but it looks like things were filtering fine.

The 15-40 I put in knocks the pressure down to 75-ish while driving and a little under 40 at idle when hot.