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Thanks for the input. I would run it more often if I didn't have to go through the whole process of getting out of the garage to do so. Once I have it in a more permanent location in a generator shed, I'll likely run it monthly to keep things fresh. I'm sure a normal 5W-30 would be fine, my only...

So, interesting point you raise there. Yes, right now, it's stored in a attached, but unheated and not insulated single car garage connected to the house by a small mudroom. In the winter it gets cold enough out there for anything to freeze, and in the summer it gets pretty hot because there is...

Ok, thanks guys.

One last question guys. I've been having a conversation on this topic with a friend, and he warned me about the Rotella because of it lacking detergent? I'm now somewhat confused. I've also read about diesel oil like Rotella have MORE detergent than normal automotive oils. Is this something I...

Thanks. I was just holding off on the PP as my research suggested it wasn't ideal for a air cooled engine like the generator runs. I asked earlier, but is there any difference in additive packages on the HMPP that would be better for this application? I have a jug I bought in error not realizing...

I realize this, but since it's the first change on something I would like to last for a while and it was a significant investment, I thought I'd ask here for the best choice for an oil that would be used year round, and through greatly varying temperatures. I'm not looking for some magical oil...

My main concern is longevity of the engine. I may not run it for tons of hours, but since I've had it we've had several situations where we had no power for more than a day. I have well water so no power means no water and it's been a lifesaver. I just try to not run it constantly because it...

When I looked last night, the M1 0W-40 was showing on Walmart for like $14.50/qt...but looking again I see the there are different flavors of it. I do see now they have the 5 quart jugs of the "European Formula". I also looked up the T6, but I was only finding it online in 10W-30, 5W-40, or...

Also curious if the oil cooler has any bearing on things? I'm assuming most don't have one, but I'm just guessing. The filters are $8 - $9.

I picked up a gallon of Rotella T6 5W-40 on sale and I'll see how it works. A gallon jug will be good for two changes, but at $16 I might get two. I see Amazon Basics has a 0W-40, but I don't know much about it.

So, in general, is a more diesel oriented oil a better choice than normal automotive synthetic? I could also just go with the Generac 5W-30 synthetic I suppose. Thanks for the information guys.

Thanks for the info. What are the particular needs of a air cooled generator engine over something automotive? What sort of things should I pay attention to. It took me a few years to hit 30-40 hours of runtime, so if I stick to the recommended change interval of 100 hours, it's going to be long...

I did some research on the M1 0w-40 and it doesn't seem cheap or readily available around here. I'll keep looking. :)

How about the Rotella T6 5W-40? It's on sale right now for ~$16 gallon.

Hey guys. It's oil change time on my generator and I'm trying to decide the best choice in oil for year round use from what I have to use here. I'm also interested in some suggestions on if there is something better to use in future changes. The generator is a large, portable 15Kw model and I've...

Originally Posted By: 3311 Looks the factory fill was a thin HDEO? It came out like water, so I'm guessing it was a 5W-20 FF, but I'm not sure if it was a pure dino, or a semi-syn. I'm still intrigued by the silver. It seems to be a constant so far...

Quote: Pinching pennies is obviously more important to you than it is to OP. To each their own. I for one thank the OP for paying for the data and sharing it with us. On a more philosophical level, some people are all about finding the perfect oil for the longest drain possible. Others simply...

That's fair, and to each his own. I especially like to do UOA's on a brand new car so I can have actual data on the break in process and see the wear metals come down from the super high factory fill to where they eventually level off as the motor becomes completely broken in. Once I hit the...

The Mazda Turbo DI's are hardcore on most oils between the shearing and the extra fuel dilution that DI introduces. On my Mazdaspeed 6, I found the Rotella T-Syn 5W-40 to be just about the best you could for those motors. The only thing better was the German Castrol, but it's harder to come by...

Originally Posted By: synthetic_crazy Don't feel bad about changing your Pennzoil Ultra at 4000 miles Insane, I just changed my Pennzoil Ultra out at 1800 miles . I am trying to clean out some buildup in my engine; Pennzoil Ultra is good stuff! I noticed a film of "sludge-like" stuff at the...