Ford V10 RV what oil?

[UncleDave]

30 is fine, but most of my gas moho friends run 0w-40.

The constant unrelenting high load results in water thin oil running out of the crank journals.

UD

 

[Oildudeny]

Heavier oil could also cause higher engine temp.

 

[xtell]

If the factory specification (established by the engineers that designed the engine) is 5w-20 then use 5w-20. Where is your data to support running 5w30 or 10w30?

 

[xtell]

SR5,

I have never seen in any owners manual, a listing of the correct lubricant weight oil for the engine in question. When it is stated 5w-20 preferred, I automatically assume that a thicker oil like 0w-40 or even 15w40 will outperform what is the "preferred" oil. I'm totally basing this on personal experience and in no was base my decision on factual data.

Nuff said,

xtell

 

[UncleDave]

Typically moho owners manuals will recommend a range of oil grades - you've seen it a million times the "grade vs temp scale."

UD

 

[mrsilv04]

I used 5w30 on my V-10 Ford, under a Coachman Class A body.

 

[loneryder]

I have used Mobil 1 5w-20 in my V-10 MH for 20700 miles since new. It doesn't use a drop, even towing a car and motorcycle. I had the oil analyzed and Blackstone raved about how good the engine looked. This was after 5k miles towing thru the Rocky Mtns. I've also towed through extreme heat.
Use a synthetic 5-20 like Ford says. Use Syn 0w-40 in the generator.