Generator oil change

M GO BLUE wrote:

Fifty4F100 wrote:

JC2 wrote:
The purchase of the oil filter wrench for removal would be a smart purchase.

Filter is off.

Unless the Onan stuff is way overpriced, that's what I'll buy. I always put Motorcraft on Fords and AC/Delco on Chevys.

Still will need the Onan wrench next time you change the oil...good thing to have

Why?

Fifty4F100 wrote:

JC2 wrote:
The purchase of the oil filter wrench for removal would be a smart purchase.

Filter is off.

Unless the Onan stuff is way overpriced, that's what I'll buy. I always put Motorcraft on Fords and AC/Delco on Chevys.

Still will need the Onan wrench next time you change the oil...good thing to have

I use 15w-40 in mine year round...

JC2 wrote:
The purchase of the oil filter wrench for removal would be a smart purchase.

Filter is off.

Unless the Onan stuff is way overpriced, that's what I'll buy. I always put Motorcraft on Fords and AC/Delco on Chevys.

I tend to keep a simple process simple. Whatever the manual recommends for your gennie is what you should use. Ours calls for 15w-40(Good quality Dino oil such as Shell Rotella) and I have always used that with 0 problems. The only exception for me would be if I were to be in extremely cold weather then most manuals will suggest a lighter weight oil. To me, the use of anything else such as synthetic oil seems to be a waste of money as you should be changing the oil yearly anyway. The purchase of the oil filter wrench for removal would be a smart purchase.

I use the same Mobil 1 10-40 High Mileage Formula oil in my Onan Marquis 7KW generator that I run in the Ford 460 coach engine. 1100 hours on the genny so far and running perfectly.

Turns out there is a Cummins/Onan dealer down from my work. I'll go by there tomorrow and check it out. If that doesn't work out (and it should) I will check out the NAPA filter.

I have an adjustable oil filter wrench I bought several years ago when I got tired of buying a new wrench with every new car that showed up. It has 3 fingers that collapse on the filter and spins it off. Fits fine. But more oil came out of the generator that I thought. Looks like at least 4 quarts. Does that sound right?

Koop wrote:

427435 wrote:

Besides the 15w-50 oil, Mobil also has a 5w-40 turbo diesel oil that is also rated for spark engine use. Either would be a good choice or similar viscosity from a reputable supplier. Read that to mean Shell, Amoco etc. but not "boutique" brands like Amsoil, Red Line etc.

Looked like good advice but you lost me with the last paragraph. Oil wars are sure to ensue!

:) :E :)

427435 wrote:

Besides the 15w-50 oil, Mobil also has a 5w-40 turbo diesel oil that is also rated for spark engine use. Either would be a good choice or similar viscosity from a reputable supplier. Read that to mean Shell, Amoco etc. but not "boutique" brands like Amsoil, Red Line etc.

Looked like good advice but you lost me with the last paragraph. Oil wars are sure to ensue!

I have an Onan 5500 gas generator in my MH. I use regular 10w/30 oil and use a Fram 3600 oil filter. This filter is longer and can be removed with a normal strap type oil filter wrench. I have 72 hrs on the Gen and it is doing fine.

Not suggesting what to do but this is what I use.

Jim