Clearing Up Synthetic Oil Confussion - Page 3 - Fuelly Forums

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Old 04-11-2010, 06:00 PM   #21
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I can say that synthetics are awesome. When I started running Rusty on Mobil 1 the vehicle was already about 14 or 15 years old, and had about 150,000 miles. When I took the timing cover and oil pan off to replace the timing chain 2 years ago (at almost 189,000 miles) everything was so clean inside it looked like a new engine that had barely been run. I regret that I had not switched to synthetic sooner. Soon, I will have to replace the valve cover gaskets on my Buick. That car has been run on nothing but Mobil 1 since the break in of the new engine was complete, about 14 years ago. I am eager to see what that engine looks like inside.

All of my vehicles still have clear oil when I change it. My oil never turns black.
you say you switched after its been run on (im assuming) dino oil and then ran synthetic for the last 39K miles and was amazed at how clean it was. i wouldnt contest all of that to synthetic. dino can keep things pretty clean as judged by my following pics:


chevettes 29 years old at the time 60K miles only has had dino oil


outside of model A engine thats been sitting since mid 50's

inside pics (yes thats 1950's oil)






thats before i ever started trying to free it up, thats as is outa the field where it sat, grandted yes it had about a 1/2 inch to an inch of sludge but meh thats understandable for nearly 50 year ol oil...
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Old 04-11-2010, 06:03 PM   #22
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excellent link. amsoil(my preferred brand) does extremely well in those tests. their newest 0W30 series 2000 is not listed or tested, so no it no doubt has even better test results! once again confirms my choice as the best bang for the buck!
Well I don't know if Amsoil is the "best bang for the buck" but yes it is a true synthetic oil as it uses PAOs instead of highly refined Group II and Group III oils.
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Old 04-11-2010, 09:13 PM   #23
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Before I switched to Mobil 1 I used Valvoline 10W30.
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Old 04-12-2010, 06:44 PM   #24
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I now recommend "synthetic" oil, in fact if you get any of the oils with a 0W rating like 0W-20, it's guaranteed to be "synthetic". "Synthetic" oil is also really good for turbo charged vehicles like my sister's Volvo. But I can't recommend the PAO oils (true synthetics) because they're usually significantly more expensive and unnecessary in our application.



Well, is it better oil or better oil service interval?
Cause pretty much all the corollas that burn oil get sticky piston rings and to prevent that from happening, I'd imagine changing the oil religiously or using a better oil would've prevented the problems they so commonly experience. Great oil 5-8K miles, crappy oil at 3-4K miles. I think it's pretty rare to find a non oil burning Corolla made between '93-'06.
I guess I must be lucky -- I personally own two of them. An 03 and 04, and even with 10k OCI (w/Mobil 1 0W-30, Toyota oil filter) not a drop burned.
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Old 04-12-2010, 07:53 PM   #25
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I guess I must be lucky -- I personally own two of them. An 03 and 04, and even with 10k OCI (w/Mobil 1 0W-30, Toyota oil filter) not a drop burned.
OCI? These Corollas tend to start their oil burning after like 40K miles..
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Old 04-13-2010, 04:58 PM   #26
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OCI? These Corollas tend to start their oil burning after like 40K miles..
OCI=Oil change interval.
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Old 04-13-2010, 05:43 PM   #27
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OCI=Oil change interval.
Well I'd imagine 10K miles of light highway driving would be ok but for the most part, people end up doing 7K miles of mixed city and highway driving with the occasional small trip on a cold day which is about as bad as it gets.
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Old 04-14-2010, 05:26 PM   #28
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Synlube in at 3800 now at 31922 with a filter change last December. No loss no leaks 40mpg in Boston Friday afternoon traffic for 4 hours.
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Old 04-14-2010, 06:48 PM   #29
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i saw an ad(pep boys) recently for a 5qt jug of conventional oil for $5. for you guys that aren't convinced synthetics are superior, it doesn't get cheaper than $1/qt. knock yourselves out, but i won't touch it!
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Old 04-14-2010, 07:06 PM   #30
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link to that ad? That's ridiculously cheap for oil!
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