Ford Truck Enthusiasts Forums - What kind of oil for a 429?

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Mr. Mcbeevee

10-19-2012 08:23 AM

What kind of oil for a 429?

I have a 1991 429 and was wondering what kind of oil I need to run in it. Do I need to run a 10-30 or 10-40? Or I keep Rotella 15-40 around anyway for equipment, would I be better off to use that? Thanks for any help you can provide.

85e150

10-19-2012 09:46 AM

The 15-40 would probably be fine.

Any indication of what was previously run?

Pollack Pete

10-19-2012 01:36 PM

I'd go with the 15-40 also.It seems like a good all-around motor oil.I've used it for years in everything from pick-ups to construction equipment.

Mr. Mcbeevee

10-19-2012 01:43 PM

No clue about what was in it, I probally go with the Rotell a then. Thanks.

rummur s.c.

10-19-2012 10:51 PM

I used 15-40 in our old 429 powered truck.. And use it in all our current trucks. Ive heard its high in detergents, and thats why its not recommended in gas engines?? But I have no idea on that, just the word on the streets around here..

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