from Mineral to Fully Synthetic oil

[ejmmaza]

mga sir okay lang ba kung mag switch ako from Mineral Based motor oil to fully synthetic?di ba magkakaroon ng problema?
btw. my car is a 2001 toyota revo glx gas. tnx

[Ginnova]

might be too thin for your seals. baka mag-leak

[ejmmaza]

ah.ok thanks
fully synthetic naman talaga ginagamit ko noon. kaya lang medyo kailangan ng tipid ng mineral muna ako
now plan ko mag fully synthetic ulit

[baludoy]

interesting insights here w/ re: to the ts' query: Car Bibles : The Engine Oil Bible

[QUOTE][If I put new, fully synthetic oil in my older engine, will the seals leak?

This question comes up a lot from people who've just bought a used vehicle and are wanting to start their history with the car on fresh oil.
The short answer: generally speaking, not any more. The caveat is that your engine must be in good working order and not be leaking right now. If that's the case, most modern oils are fully compatible with the elastomeric materials that engine seals are made from, and you shouldn't have any issues with leaks.
The longer answer:

Mixing Mineral and Synthetic oils - current thinking

Here's the current thinking on the subject of mixing mineral and synthetic oils. This information is based on the answer to a technical question posed on the Shell Oil website.
There is no scientific data to support the idea that mixing mineral and synthetic oils will damage your engine. When switching from a mineral oil to a synthetic, or vice versa, you will potentially leave a small amount of residual oil in the engine. That's perfectly okay because synthetic oil and mineral-based motor oil are, for the most part, compatible with each other. (The exception is pure synthetics. Polyglycols don't mix with normal mineral oils.)
There is also no problem with switching back and forth between synthetic and mineral based oils. In fact, people who are "in the know" and who operate engines in areas where temperature fluctuations can be especially extreme, switch from mineral oil to synthetic oil for the colder months. They then switch back to mineral oil during the warmer months.
There was a time, years ago, when switching between synthetic oils and mineral oils was not recommended if you had used one product or the other for a long period of time. People experienced problems with seals leaking and high oil consumption but changes in additive chemistry and seal material have taken care of those issues. And that's an important caveat. New seal technology is great, but if you're still driving around in a car from the 80's with its original seals, then this argument becomes a bit of a moot point - your seals are still going to be subject to the old leakage problems no matter what newfangled additives the oil companies are putting in their products.



Read more: ]Car Bibles : The Engine Oil Bible