Synthetic oil

[Bob77064]

Some say not to use synthetic oil until the engine is broken in because it does not have enough friction. But there are many vehicles that come with synthetic oil as the factory fill.

 

[LWG]

That used to be the case. Syn oil was so efficient at lubrication that rings wouldn't seat. Manufacturing has gotten better, and tolerances tightened. The engines that come with syn oil from the factory are held to tolerances that don't require break in. It used to be that you were advised to do the first oil change at 500 miles. Things have gotten better since then.

 

[Bob77064]

Thank you LWG, I remember the days of 500 mile break in oil.

 

[herd]

I switched to synthetic in all my vehicles, all are 9-10 years old. Not sure if it was a good move or not, seems to be using more oil. I wa told by someone that now I can't go back. Anybody know if this is true, that once you switch to synthetic, you can go back to dino? tks

 

[Gale Hawkins]

I switched to synthetic in all my vehicles, all are 9-10 years old. Not sure if it was a good move or not, seems to be using more oil. I wa told by someone that now I can't go back. Anybody know if this is true, that once you switch to synthetic, you can go back to dino? tks

I have done the same and much older. So far no problems. It was about 5 years ago on the 454 TBI in the MH at 92K miles and at 109K it still does not leak and still runs 3000 miles and only be a quart low at change time.

You can mix, blend, reverse usage at will. I have read newer spec'ed dino oil is about 25% synthetic already.

 

[Dana Warner]

I switched from Rotella T 15-40 to synthetic Rotella 5-40 in my 90's B7100. The tractor starts much easier and quieter. Has not leaked a drop.

 

[ray66v]

I wa told by someone that now I can't go back. Anybody know if this is true, that once you switch to synthetic, you can go back to dino? tks

That incorrect advice is among the top ten wrong things people say about synthetic oil. Check the oil manufacturers web site.