Oil temp. How hot is too hot. (1 Viewer)

[jjdeneen918]

‘96 Lexus LX450, running the Wits End turbo kit.

I’m seeing water temp & oil temp readings from my JRP (Just Race Parts) gauge.

Water temps usually see is 5-6 degree hotter reading from the ODBII gauge (Scan Guage II) display. But the JRP water temp sensor is reading temps comming from just out of the head, so I assume that’s the degree difference?

My JRP oil temps are consistently reading about 10-12 degree difference between water & oil temps.

For example, yesterday, water temps were reading, from JRP guage): water, 186, oil temp was 202 temp.

So my question is, how hot is too hot for oil temps in general or for the 1FZ?

 

[White Stripe]

Depends on what oil you use. Different oil looses it's viscosity at different temperatures. Amsoil I think is good until close to 300. Most oil is good a little beyond 230.

 

[Kernal]

Sounds like your engine is operating as designed (oil a bit hotter than coolant). Just keep the cooling system in good working order, use a top tier oil and filter, and the engine will be happy.