sixdogs
Super Star Member
- Joined
- Dec 8, 2007
- Messages
- 13,192
- Location
- Ohio
- Tractor
- Kubota M7040, Kubota MX5100, Deere 790 TLB, Farmall Super C
What is the correct oil to use in my 25 year old 19hp, twin cyl, air cooled Generac generator. This is from the old days with higher ZDDP in the oil and I don't want to screw up my house generator with modern oil. The generator has test run more than actual use and only has maybe 15 hours of non-test use. So the rings aren't even seated yet.
Here's my engine, front ID tab and owner's manual oil requirement
![IMG_4564.jpeg IMG_4564.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757040-b65f29eab45f462ec29ace7c6355ec1d.jpg)
![IMG_4552.jpeg IMG_4552.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757042-d19030de0b65b9602a0bd74a6f6b8288.jpg)
What I have been using is some ag gas engine oil that correct for the but is 30W and I want to go lighter like 10W30 or even synthetic for the winter. I could also use modern oil and just add a little ZDDP additive. I have done this with other gas engines and know the % mixture from company instructions
But, here's what I saw the other day in a shop but I know nothing of these oils. Does anyone know anything about these?
![IMG_4550.jpeg IMG_4550.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757043-d0d9f0f7ce8c73119a0ec3627ea05e5a.jpg)
My plan at the moment is confusing. Should I just use modern synthetic gas engine oil if OK for rings seating, add a little ZDDP and call it good or go with a pre packaged oil as shown in the pictures? Are they really different? Any knowledge or help appreciated.
Here's my engine, front ID tab and owner's manual oil requirement
![IMG_4564.jpeg IMG_4564.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757040-b65f29eab45f462ec29ace7c6355ec1d.jpg)
![IMG_4563.jpeg IMG_4563.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757041-3a979c19d200293231def83401b94e34.jpg)
![IMG_4552.jpeg IMG_4552.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757042-d19030de0b65b9602a0bd74a6f6b8288.jpg)
What I have been using is some ag gas engine oil that correct for the but is 30W and I want to go lighter like 10W30 or even synthetic for the winter. I could also use modern oil and just add a little ZDDP additive. I have done this with other gas engines and know the % mixture from company instructions
But, here's what I saw the other day in a shop but I know nothing of these oils. Does anyone know anything about these?
![IMG_4550.jpeg IMG_4550.jpeg](https://www.tractorbynet.com/forums/data/attachments/757/757043-d0d9f0f7ce8c73119a0ec3627ea05e5a.jpg)
My plan at the moment is confusing. Should I just use modern synthetic gas engine oil if OK for rings seating, add a little ZDDP and call it good or go with a pre packaged oil as shown in the pictures? Are they really different? Any knowledge or help appreciated.