Engine oil temperature diesel

A question we get asked all the time, is how hot is too hot for my engine oil, and how cold is too cold?

To get straight to the point while there is no hard and fast rule for every and any engine out there, in general for a 4-cylinder performance engine we are at our oils optimum temperature range between 100 and 110 degrees Celsius. Note the use of the word optimum, as that is different to maximum or minimum.

Even once we know this though, inevitably many people have 2 great follow-up questions.

In this article:How Hot Is Too Hot?

| How Cold Is Too Cold? | Where Can I Learn More?

What Happens If My Engine Oil Is Too Hot?

Will you damage your engine if you go hotter than 110 degrees Celsius? Potentially, yes you can do some damage if your oil temperature gets too high, but the damage will more likely stem from your oil pressure dropping if the viscosity of your oil is too low for such conditions rather than the lack of modern synthetic oils ability to lubricate.

Some teams will happily run their engine oil

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