Negative side effects of switching to synthetic?

[Jay 535i]

My engine has 225,000km on it (about 140,000mi). It's always been run on regular motor oil.

I've been told that, if I switch to synthetic now, I risk unclogging any number of engine leaks that are sealed with old sludge, creating a long-term nightmare.

Is it true?

[Interceptor]

My engine has 225,000km on it (about 140,000mi). It's always been run on regular motor oil.

I've been told that, if I switch to synthetic now, I risk unclogging any number of engine leaks that are sealed with old sludge, creating a long-term nightmare.

Is it true?

Yes, it is. It happend to me. I solved it with a ceramic oil additive.

[Jay 535i]

Yes, it is. It happend to me. I solved it with a ceramic oil additive.

Tell me more, man.

[Qube]

Would you care to explain this "ceramic oil additive"?

[SharkmanBMW]

yes, tell us what you know!

[uscharalph]

My engine has 225,000km on it (about 140,000mi). It's always been run on regular motor oil.

I've been told that, if I switch to synthetic now, I risk unclogging any number of engine leaks that are sealed with old sludge, creating a long-term nightmare.

Is it true?

I did the change over to Mobil 1 synthetic 2 days ago. So far no leaks, but I'm sure it takes a while. I'll keep the forum posted if this changes.

[uscharalph]

Yes, it is. It happend to me. I solved it with a ceramic oil additive.

How long did it take for your leaks to appear?

[bimmerd00d]

bought my car with 90k or so on it. put mobil1 in there, it leaked for about 15-20k, then the seals and rings were conditioned and it stopped. No leaks or any other problems when i sold the car at 218k

[Interceptor]

yes, tell us what you know!

Read here: http://www.ferret.com.au/articles/48/0c035c48.asp

or go to http://www.liqui-moly.de and choose English then Products -> Catalogue -> Additives -> Oil Additives.

It restored my compression, reduced engine noise and helped with the noisy/leaking hydraulic valve lifters. The procedure should be repeated every 50k km. Oh yeah, it improved my gas mileage and performance.

"CERA TEC is a high-tech ceramic wear protection product for all motor oils. CERA TEC reduces friction and wear due to ceramic compounds that withstand extremely high chemical and thermal loads. Prevents direct metal-to-metal contact, thus increasing the engine service life. The low-friction effect reduces fuel consumption in gasoline and diesel engines. Sufficient for 5 liters of motor oil. Operational area: CERA TEC is added to motor oil and is self-mixing. CERA TEC provides extreme wear protection for all moving parts and friction surfaces in the engine."

[Interceptor]

How long did it take for your leaks to appear?

After the first 500 km it consumed around half a liter of oil I do have a slightly leaking valve cover gasket, but that shouldn't be the reason for that much oil consumption!