Mobil 1 Logo with trademark
Mobil 1 RacingTM
Car Care for a Better Ride

My Mobil
Discover the Benefits of Membership
Forgot your username or password?

YouTubeMobil 1 Merchandise
Mobil 1 Rewards
Ask MobilAsk Mobil
Any Worries About Oil Coking in a Turbocharged Race Engine?
Ask Your Stickiest Question. . . Or ask us something you’ve always wanted to know about using our products. We’ll sort through all the submissions and present the best questions to our automotive experts. We'll share the questions and their answers here.
Any Worries About Oil Coking in a Turbocharged Race Engine?
Hello. I run your 0W-40 in my turbocharged road race engine. Sometimes if I have to shut down hot, I will notice on my data logger later that my turbo oil exit temp hits 250°C! Is this too high? At what temperature should I start to be concerned about oil coking in my turbo? Thanks in advance!
-- Matthew Shemenski, Simi Valley, CA
The temperatures you are seeing are quite high but not surprising. There are a couple of things you can do to protect the turbo from coking. You are already doing the first thing we would recommend which is to use a fully synthetic oil such as Mobil 1™. It will protect better against deposits and resist thermal breakdown than a conventional mineral oil. As you probably already know, Mobil 1 is chosen by leading carmakers precisely because it can protect turbochargers better than conventional and many other synthetic oils. Secondly, you should let the vehicle run for awhile after racing to help cool the oil down a bit. Lastly, you need to be careful you do not overextend oil change intervals under these severe conditions.
Ask a QuestionAsk Mobil
Copyright 2005-2014 Exxon Mobil Corporation. All Rights Reserved. ExxonMobil Home | Site Map | Contact Us | Privacy | Legal