When my Oil Cooler broke on 'Cherry Blossom' my 1990 XJS 5.3 V12 which I am restoring.

I temporarily replaced the Oil Cooler with a by-pass Pipe, which I had made up for the job.

The reason being I want to get her past the MOT before I spend £300+ on a New Oil Cooler with Pipes.

In the UK we don't normally get the Scorching hot Temperatures of the USA but yesterday was about 18/c

Which is considered to be very hot in the UK.

After half an hour of driving round my garden, I took a digital reading with my hand held digital temp gun.

Where I got a reading of 110/c which I suspect would have been a bit Cooler, had I been driving along an open road.

Is 110/c an acceptable Temperature for the Oil, or is it getting too Hot?

The Oil I am using is a good quality 10/40 Semi Synthetic.

 

Broadly speaking....

According to many sources 95ºC-110ºC is an ideal range. About 127ºC seems to be the danger point for conventional oils. The danger point for most synthetics is about 149ºC.


Cheers
DD

 

Doug nailed it.

 

Cheers Doug!

That's very reassuring but when I take out my Grey XJS which does have an Oil Cooler, it could be interesting to see how much difference having an Oil Cooler makes.