Switching from Synthenic to Dyno Oil?

RVUSA wrote:

Gjac wrote:

Jarlaxle wrote:
Oil is oil. Use whatever oil that meets the requirements that you can get the cheapest.

This is what I do but have some observations. I switched to WM syn 10-30 for MH and tow car about 6-7 years ago. First drain on syn in MH noticed a lot of small chunks of carbon in oil, other than that no improvement in MPG or lower operating temps. When I put it in my 2002 Toyota Corolla it leaked around the pan for several oil changes and several re torquing of the pan bolts. Same kind of carbon deposits in oil change with the syn. I had a slight oil leak in my generator when I used syn I made it much worst. I will go back to Dino oil for the gen set, but will use what ever is on sale for the tow car and MH.

synthetic oil is a high detergent oil. It will get under and loosen old dino oil that has coked onto the engine surfaces. It is most likely the reason you see those little chunks of carbon.

"I will go back to Dino oil for the gen set"

I believe you will find the recommended oil for gennys is typically high detergent oil. For the very reason explained above. Dont use plain old oil in a genny. You cant change the oil enough with cheap dino to offset replacing it because it coked the oil rings up and died.

You are trying to save a buck but putting yourself at risk of spending thousands upon thousands. Price a engine swap, and then cost it against the savings you'll get from what ever is on sale oil vs. synthetic. you'll see, hopefully.

Pablum. After watching dozens of vehicles run up huge miles (saw 640K on one car) on whatever bulk oil the owner got the cheapest, I realize that oil is oil! My big Tecumsah generator has run 19 DAYS straight, it runs perfectly with probably 5500+ hours....all it gets is regular 15W-40 oil.