Best Engine Oil
#17
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I dunno guys i've been using Mobil 1 for years in all my cars, the last car I bought at 100k and started using it right away I just sold the car with 245k it never leaked a drop of oil although the car had high miles it still ran great, I still change it every 3500 miles, I'm a freak about maintenance and will continue using it in my LS400, 4Runner and Chevy pickup.
#19
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I just know my low miles 2000 car leaked ever so lightly after going full syn in it. Even developed a small drip it never had before, the car now has about 55,000 miles on it. And has been on the syn for about 10 years now.
#21
Lexus Test Driver
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BTW, they've been arguing about synthetic vs. non-synthetic since the dinosaurs roamed the earth. I don't think we're going to resolve anything on that here today. Lots of good opinions here (and humor too) with science and experience to back it up. Thanks for sharing positively.
#22
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So that means you can buy Mobil 1 before rebate for about $4.80 quart (assuming your 10 for $24 does not factor in tax, which makes it not such a deal). Where can I do that? Yes, 10 quarts for $24 - sign me up for some of that.
BTW, they've been arguing about synthetic vs. non-synthetic since the dinosaurs roamed the earth. I don't think we're going to resolve anything on that here today. Lots of good opinions here (and humor too) with science and experience to back it up. Thanks for sharing positively.
BTW, they've been arguing about synthetic vs. non-synthetic since the dinosaurs roamed the earth. I don't think we're going to resolve anything on that here today. Lots of good opinions here (and humor too) with science and experience to back it up. Thanks for sharing positively.
![http://www.amazon.com/Mobil-120846-Extended-Performance-5W-30/dp/B00J00X3NW/ref=sr_1_1?s=automotive&ie=UTF8&qid=1431819321&sr=1-1&keywords=mobil+1](https://www.clublexus.com/forums/images/misc/amazon_icon.gif)
You can do two rebates, so if you buy 2, you get $24 back. Yes, it's a deal, even with tax.
https://mobiloil.com/en/promotion/mo...nd-mobil-super
Last edited by aptoslexus; 05-16-15 at 04:59 PM.
#24
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Can't escape it, I guess.
Most people overthink it, really. Most people should stick with manufacturer's recommended oil. Only time to use something different would be: if you live in extreme climates or if you had your engine rebuilt and the builder told you to use something else during break-in period.
#26
Lexus Test Driver
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But they had plenty of tribology theory back in the late '80s when our engines were designed. I also know that with higher gas prices now, manufacturers try to lean towards thinner oil to reduce drag in the engine, at the expense of greater wear. But this goes into the engine design when it's real, and not when it's not real, and done for marketing reasons.
I of course don't know the examples of back-spec'ing you're talking about. I'd be interested to hear if it is ever done for reasons other than I listed above - which to me are not very good reasons to change the spec, and I will try to understand and probably ignore.
Example - one of my other cars is an older Porsche 911, factory spec'ed with 15w-50 or 20w-50. And yes it even has a Shell sticker on the engine heater blower, which was changed to a Mobil1 sticker in later years - and no, I don't think the engine design engineers thought that one up either. That's what I've used all these years. Fast forward to around 2014, and the Porsche marketing geniuses (really) release a synthetic, Porsche branded, "engineered in Weissach," 10w-60 oil in a painted steel can, suitable for display in your living room, for $10+ per quart, claiming to be back-spec'ed to virtually every air-cooled Porsche ever made. There is no "theory" involved here other than marketing.
![](https://cimg3.ibsrv.net/gimg/www.clublexus.com-vbulletin/350x350/porsche_classic_motor_engine_oil_911_964_993_10w60_copy_71aa8ecadf0ea242534dbd75df559da4b629c8e5.jpg)
And yes, I did want to buy a quart of that to put on the coffee table in my living room, but my wife has veto power over calls like that.
Last edited by oldskewel; 05-18-15 at 11:14 AM.
#27
Lexus Test Driver
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Walmart http://www.walmart.com/ip/Mobil-1-5W...5-qt./17034372 and Amazon.com had it for about $24 for the 5 quart jugs. I think amazon ran out of the cheaper stuff, but you can still pick up the extended performance for about $27: http://www.amazon.com/Mobil-120846-E...ywords=mobil+1
You can do two rebates, so if you buy 2, you get $24 back. Yes, it's a deal, even with tax.
https://mobiloil.com/en/promotion/mo...nd-mobil-super
You can do two rebates, so if you buy 2, you get $24 back. Yes, it's a deal, even with tax.
https://mobiloil.com/en/promotion/mo...nd-mobil-super
and then a regular 5w20 (for a different car) at PepBoys for 24.xx. ($40.49 minus 40%)
http://www.pepboys.com/product/details/305901/00827
Both prices are before tax, but shipping was free for both, and I'll be getting $12 back on each from Mobil.
#28
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For hot climates a 5w- ? is pretty watery. As 5 is the base with viscosity index improvers added. And there are many cars that are less than 10 years old advertised needing engine work nation wide. I have seen many a newer car or truck smoking, its a different requirement between what the bearings require vs what the rings require for lubrication.
#29
Intermediate
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My LS has 275,000km.. always had 100% syn... never leaked or used a drop of oil...
I say stay away from all synthetic. Why 300 K miles and its not been on it. Its high time and all syn type will easily leak.
Your temps are 64 to 122 degrees F ? So what oil has been running in it?
You could run something like 15w-40, straight 30 or 40. Or just go with what has been in it.
I have run 20W-50 in a high time LS in the summer here, and our temps hardly ever get into the 100's.
Local Mercedes dealer uses 5W-40, our temps here can dip into the below freezing in winter time so.
Your temps are 64 to 122 degrees F ? So what oil has been running in it?
You could run something like 15w-40, straight 30 or 40. Or just go with what has been in it.
I have run 20W-50 in a high time LS in the summer here, and our temps hardly ever get into the 100's.
Local Mercedes dealer uses 5W-40, our temps here can dip into the below freezing in winter time so.
#30
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while we are on the subject, as with all motor oil threads, please read!
http://www.bobistheoilguy.com/motor-oil-101/
to the OP, ambient temp plays a role in choosing the viscosity or grade of your oil. what have you been using normally? I would venture to guess 10w-30. conventional or synthetic is a matter of preference at this point.
http://www.bobistheoilguy.com/motor-oil-101/
to the OP, ambient temp plays a role in choosing the viscosity or grade of your oil. what have you been using normally? I would venture to guess 10w-30. conventional or synthetic is a matter of preference at this point.
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