Synthetic blends are supposed to be good for vehicles that have old seals in them. Old seals tend to shrink when a full synth is used and cause oil leaks. They're supposed to offer the protection of full synth with the lack of leaks. Granted, this is at the expense of oil longevity.
However, if there is a high-mileage full synth it might have additives to counter this so it doesn't matter then. |
My father had the opportunity to dyno his car once, and in between runs he changed the oil from regular 10w30( I believe) to Mobil1. I'll have to ask him again, but I remember it free'd up alot of power and the engine was cooler. I wanna say +10hp and -170F at the head...
I run dino Valvoline 10W30 in my car, just becuase I can get it super cheap and my car has about 135,000 miles on it, so I'll just stay with the dino. |
Not all synthetics are pure synthetic. The only ones I know of that are full synthetic are Amsoil, Synlube and some higher end Mobile 1.
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There are more true synthetics out there than that, but that is a good point. If they are not pure synthetic however, it should say "blend" somewhere on the label.
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I think smay665949 is talking about how now most "synthetics" are now made from dinosaur juice. There was a legal decision that it's ok to mark them synthetic just because they were very well refined, rather than having to manufacture them in a lab.
https://www.gassavers.org/showthread....616#post114616 https://www.gassavers.org/showthread....558#post105558 https://www.cdxetextbook.com/engines/...heticoils.html Quote:
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That's a bit discouraging, much like the FDA ruling that high fructose corn syrup is "organic".
Regardless, the question becomes: Does it really matter in terms of longevity and performance? Feel free to geek out over the pros and cons there. Credible evidence is lacking. :rolleyes: |
Considering how well dinosaur juice that's not marked "synthetic" works these days, I'd say that you can be pretty confident in "synthetic" oils that are hydrocracked from dinosaur juice.
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The oil analyses also verify that less wear is taking place inside the engines and transmissions. My Mazdaspeed 3 supposedly came with synthetic in the transaxle but I changed it to Royal Purple synthetic at 14k and both cold and hot shifting improved. Me? I'll use nothing else. Jim T. |
Jim T,
i'm with ya fully. i really don't care what the so-called experts say or any data that says otherwise. synthetics have proven themselves to be superior quality in my application, PERIOD. i must say that i've only used PAO based mobile1 and amsoil, however. |
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