API Service level for RTV engine oil

dimanche 18 septembre 2022

Getting ready to change the fluids in the RTV.

The manual states to use API Service CC, CD or CF. I checked the shelves and don't have any in stock.
What I do have is Rotella T5 diesel oil with API Service CJ-4, CI-4, CI-4 PLUS, CH-4, CG-4. This is 10W-30. Also have John Deere oil with similar specs but it's 15W-40 which I'd think is probably a little to heavy for our winters.

I'm not an oil expert but I think I recall something like:
As the second letter increases up the alphabet, it...

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API Service level for RTV engine oil

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