hmmmmm i am trying a 5w40 with my car tuners recommendation...originally my temp was getting to 220 just a trip to a gas station with no boost...we are going to see if this helps the temp come down

What kind of oil cooler are you using?

Which one though? There's more to oil than what temp your gauge ends up showing, or what numbers the bottle shows. I wasn't going to say anything because there are entire websites/forums dedicated to oil, ( http://bobistheoilguy.com ) but the fact that your tuner simply suggested a different weight, and not an actual product, means he doesn't really have any idea what to tell you. Other than, "you'll run hotter, buy bigger numbers". Im not FI yet, but I run Mobile 1 0W-40. You will find that this oil is loved by many folks for scientifically tested reason. I'd say do lots of research, or get advice from someone who actually knows what they are talking about, which is what you are doing here. "Trying 5w40" doesn't sounds like the best approach though.

This and if your plumbing is not right can have a significant impact on cooling or heating things up.

Just an FYI... The "W" does NOT stand for weight. It actually stands for winter. The lower the number, the lower the cold temperature protection.

I run the 0w-50 Eneos in my Supra. Seb changed me over from M1 to that before he tuned it.

I’ve been thinking about fabricating a block off I can slide in for the cooler months. My intercooler is already in front of my oil cooler so it doesn’t have direct exposure. Just a b**** to access lol


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LOL, I know exactly what you mean!

Are you guys saying even with a thermostatic plate, oil temps are not warming up in a timely manner? What's going on?

Well I was talking about the oil temp remaining in spec whenever you’re just cruising down the road and occasional mild “spirited” driving. If I got the hammer down the oil temps go up but when the cooler air is steady on it the temps will drop well under that spec temperature. Which I believe is 180 degrees F. But don’t quote me on that just yet.


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As long as you stay above 160 you are good to go. A sandwich will help to a degree. I run without one!

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Probably because they have the oil temp sensor in the stock location (post cooler) which isnt ideal. I would see 80/100 degree oil temps in cool weather in this location, i switched the sensor pre cooler and saw 170/180 degree temps. This happens because the oil gets overcooled when the plate is closed>limited flow to the cooler and when it mixes with the oil going back to the block you see really cool temps. Anyone else experience this too?

Now the real question is
What brand of gas are you using with your TT setup?

ugh this is the worst part of being in Korea...the gas out here is so unregular that I have to tune at a 91 octane in case a station i go to claiming to have 93 is actually 91....better to be on the safe side than running lower than what i am supposed to

Are you the black Supra that he recently tuned but won't show numbers?