[Formulajones]

That doesn't seem like a big drop in hot pressure after a hard run to me Nick.

You could likely and very simply just change oil brand or viscosity of the oil and see those minor pressure differences change. 5-7 lbs. change when hot wouldn't bother me, as long as your hot idle pressure isn't ridiculously low to begin with.

I used to run VR1 20-50, and I would see hot idle pressure drops that you mention just from a 20 mile highway cruise at 3,000 rpm, and would consider that pretty normal. Switched to Amsoil 20-50 many years ago and haven't really noticed any pressure drop hot or cold which leads me to believe (and it's been mentioned to me before) that this oil is likely holding it's viscosity better.

[Nicks67GTO]

Originally Posted by Formulajones

That doesn't seem like a big drop in hot pressure after a hard run to me Nick.

You could likely and very simply just change oil brand or viscosity of the oil and see those minor pressure differences change. 5-7 lbs. change when hot wouldn't bother me, as long as your hot idle pressure isn't ridiculously low to begin with.

I used to run VR1 20-50, and I would see hot idle pressure drops that you mention just from a 20 mile highway cruise at 3,000 rpm, and would consider that pretty normal. Switched to Amsoil 20-50 many years ago and haven't really noticed any pressure drop hot or cold which leads me to believe (and it's been mentioned to me before) that this oil is likely holding it's viscosity better.

Running Brad Penn 10/40 with zddp for my SFT cam. I think that's top end stuff... right?

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[Formulajones]

Originally Posted by Nicks67GTO

Running Brad Penn 10/40 with zddp for my SFT cam. I think that's top end stuff... right?

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Brad Penn makes an excellent oil.

Wonder how hot you were getting it...

[Nicks67GTO]

Originally Posted by Formulajones

Brad Penn makes an excellent oil.



Wonder how hot you were getting it...

Not sure but that updated quad gauge on the right is gonna let me know this year.

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[Formulajones]

Cool, if you go with a cooler before and after, might be able to share some useful data that might be interesting.