Oil Pressure issue after lots of searching

[Chip Birks]

I use Mobile 1 0w-40 in my engine, along with an additive literally tested in flat tappet, aircooled engines. Its called Hyperlube, and can be found at Autozone. I had a huge oil temp issue when running 20-50. Switched to this combo and temps dropped a ton, in the neighborhood of 30-40 degrees. Oil pressure is fine too.

[66NCVW]

Well turns out I think it was just changing the weight of the oil. With 15/40 Rotella I now have 8-10psi hot idle like 240 degrees on the autometer. This is with a sschadek 30mm pump, full flow going back into the old relief valve port from filter, 15w40 rotella. I'm hoping the oil temps start to come down after the motor breaks in more? :shrug: I've ordered an external oil cooler in hopes that the added heat from the turbo etc is whats causing the temps to go up. Do you think that switching to the 0w-40 or a different synthetic weight would help with my oil temps?

[Chip Birks]

Switching to the 0-40 dropped my temps in a huge way. That was the only change i made.

[66NCVW]

How much did your oil pressure drop with the change if any?

[Tony Z]

Rimula R4X 15W40 - 1250ppm ZDDP - I had some tested last year

That should be fine, no US EPA ruining good oil in SA.

I actually had it supplied and tested in Europe. So I dont see it being that much different to what you guys get in USA

[Piledriver]

I should point out the "zddp wars" are over, and it has been effectively replaced with better.
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