dian1511

I know that there have been lots of discussion concerning synthetic oils on this site. I have read through most of them. I still have one question:

My office colleague, said that I should not put synthetic oil into my new TL until after 7,000 miles. He said that synthetic oil will not allow my engine to break in. I don't understand all this because I am not a chemist or engineer. I read on the Mobil One site that this a only a myth. That you can use sythetic oil straight from the factory. The 7,000 mile theory had something to do with the way the synthetics were initially formulated. Evidently the new formulations correct for this?

Please can someone shed some light on this topic? If there is a previous discussion, please let me know. I will try another search.

Thanks much,

Dian

ChucksCL-S

Dian, since the piston walls and piston rings that ride on them are not micro-perfect from the factory, a new engine will break in as the saying goes by scraping alittle metal from the surfaces to eventually match perfectly, giving the highest possible compression. This is what you want. The belief right now is that conventional oils allow this to occur but that super slippery synthetics do not. It takes some number of miles to do this, as your friend says. Then the switch to synthetics gives your engine the best diet available. I am not an engineer but this is the general thinking; maybe other members will fill you in too. Hope this has helped.

dian1511

Thanks chuckstl

I've read and heard conflicting reports about this. If what you say is true, and I don't doubt it, I hope that there are members on this list who would know what the right mileage would be for one to change to synthetic oil. The Mobil one site says that you can use it right away.

Road Rage, any thoughts?

copland007

I had emailed RedLine about that same issue, here is what they wrote back:


We recommend seating the rings before installing the Red Line, we recommend waiting 1500 to 2000 miles for the rings to seat and the initial wear to take place.
There isn't any special preparation necessary when changing over to the Red Line Oil it will mix and is fully compatible with a petroleum oil, just do a typical warm drain and refill.

ChucksCL-S

Dian I have heard anywhere from 5K to 15K miles is good, but there will be a zillion opinions on this.

dian1511

BTW, on the thread page, this thread has a closed blue envelope with a black dot on the seam of the envelope. I looked in the FAQs and could not find out what this means? Anyone?

copland007

it means that it is a thread which you have posted to

TommyBoiSxty9

yep, now i have ablack dotted envelope