ended up with 5400 = 67.7 , 8000 = 73.3 . it only gained 4lbs the whole pull. the oil is 10w40 . The first couple pulls the oil psi was dropping and we added one quart. But the psi was in the 80's, honestly i dont remeber how much HP it gained from just that. I know its not a big deal here, but i really dont want to talk about HP numbers. [/quote]

Didn't need to know your HP, just curious if the lower pressure showed any meaningful gains.
Doug
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I’m not
Sure , we made more than one change at a time. But it did help , I’m sorry but I don’t have a number