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Klevee wrote at 2014-05-10 08:03:48
The answer posted is incomplete. You can mix synthetic and conventional oils without worry. Ultimately they are both oil.

If mixing wasn't a good idea why do blends exists?  

And switching from conventional to synthetic and back again is fine.

Remember, synthetic oil is still oil,only in a much purer form this longer intervals can be achieved. If you aren't going to extend the interval though and are changing every 5000 miles or less than save your money and use a conventional.

Synthetics last longer in service. That's all. They aren't more slick or slippery or any of that nonsense.  


Klevee wrote at 2014-05-10 08:04:03
The answer posted is incomplete. You can mix synthetic and conventional oils without worry. Ultimately they are both oil.

If mixing wasn't a good idea why do blends exists?  

And switching from conventional to synthetic and back again is fine.

Remember, synthetic oil is still oil,only in a much purer form this longer intervals can be achieved. If you aren't going to extend the interval though and are changing every 5000 miles or less than save your money and use a conventional.

Synthetics last longer in service. That's all. They aren't more slick or slippery or any of that nonsense.  


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Harry Jacobson, P.E.

Expertise

I specialize in Chevrolet and GMC 6.2 diesels, particularly the early versions. I own a 1983 G-20 and a 1984 K-2500 and have removed and installed engines, suspensions, electrical systems and parts, and performed general maintenance on them.

Experience

I have over 30 years of repairing cars and trucks as my primary hobby. I have worked on many different makes and models. I also own two 1985 Toyota MR2s. I have replaced the clutches in both of them and the engine in one of them. I wired one of them for power windows and door locks, using parts obtained from a dismantled MR2.

Education/Credentials
Bachelor of Science in Mechanical Engineering, 1980, University of Memphis.

Licensed Professional Engineer since 1991, Utah.

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