psibrr

Been almost 3 weeks, after a 2nd oil change switchingg to full synth 5/30, temps seem to heat up a bit more and faster, around 180F after 8 miles of light to medium traffic from cold morning start ( 60s - 70's F. )

210F w/ ambient in 80's after some miles. Of course any high air flow can cool an engine, under 4K there's no probs.

However, couple days ago noticed 220 with 20 min of low gears in city to highway traffic, high 80's, no a/c on; wondered if there was any cooler at all.

Optimum oil temp is 212F; that's when ideal viscosity is reached, and any water will boil out of oil. 220 not too bad if that's typical traffic limit with this cooler type, over 220 would be a failure imo.

If true that all the 350's had this water/oil cooler design, should expect its performance specs re: 370 engine heat to be fairly well known by now by Nissan at least; a 380RS Touge utube vid is from 2009; think that has a lower heat issue?

This is old news here/now, but spoke with Niss Consumer Service guy today after he needed a second day to contact mechanix and verify existence of an oil cooler for '12's, but had no info on specs, temp ranges to expect v. rpm and ambient temps etc; this should be in the owner's manual.

3 Niss dealer's in town knew nothing about cooler reality either.. maybe they should get onto this site.. I'll mention that to them next time; basically we're still in age when 1/3 of population is not computer literate.