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A few motor heads and I were bs'n bout oil and changes and synthetic vs conventional vs blended blah blah blah. One of my friends stood there with a smirk and said “Blended. Ha. Like thats a new thing. I have been runnin 4 quarts conventional with one quart synthetic since it first came out. It's gotta be somewhat compatible, otherwise you'd hafta wash out your engine to switch. I figured that way I'd get the moleculer benifits of synthetic without spending a ton on 5 quarts of it”! Needless to say I thought he was nuts, but then realized, he has 240 k on a S10 4.3, and well over 200k on his wife's Tahoe so, . . . . hmmm. Me? I don't have the balls to be risky my stuff but I was curious to what YOU guys thought. Seems there is some wise fellows on here when it comes to oil properties. Thanks in advance, Fido.
Code 347 CLDTI
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Truth is, your friend would have got that engine life with just regular oil and judicious oil and filter changes.
Tell him to hit the books and do some research before he makes wild claims in the future. How does he substantiate his claim of “I figured that way I'd get the moleculer benifits of synthetic without spending a ton on 5 quarts of it”! “. I find it totally amazing how guys like that can know more than a lubrication engineer with several related degrees (not me though, but I rely on their knowledge).
I'll add more later if time permits.
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Nice clip: The 3,000 mile myth.
Interesting read:
In July 1996, Consumer Reports published the results of a two-year motor oil test involving a fleet of 75 New York taxi cabs and found no noticeable advantage of synthetic oil over regular mineral oil. In their article, they noted that “Big-city cabs don’t see many cold start-ups or long periods of high-speed driving in extreme heat. But our test results relate to the most common type of severe service – stop-and-go city driving.” According to their study, synthetic oil is “worth considering for extreme driving conditions: high ambient temperatures and high engine load, or very cold temperatures.”
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