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Synthetic Oil at 90K miles Forums > > Synthetic Oil at 90K miles Synthetic Oil at 90K miles
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Maxima Nissan Maxima Discussion Forum

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  #1  
Old 08-26-2006, 04:57 AM
2001Maxima
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Default Synthetic Oil at 90K miles

I have a 2001 Maxima at want to go full synthetic. Someone suggested the mileage might be too high to do so at this point. Any thoughts?
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Old 08-26-2006, 08:58 AM
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momud momud is offline
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if you've owned it since the beginning and you did 3-5k oil changes like clockwork and it doesn't leak then i'd probably do it.. first i'd just add maybe 1/2 to one bottle of synth. oil to your dyno one of the same weight. if you see leaking then i'd not put in synth. in again. if you have no leaks do the first filter change sooner, not later.. <~2000mi? synth cleans your engine and if the sludge build up is heavy then you'll be lubricating with sludge not oil.. otherwise synthetic oils are just great.

my 94 pathfinder has 115+++ mi and i use 1qt of Mobil1 (+3qt dyno) at oil changes.. thinking about going with more in the next few changes.. i don't drive the truck that much though.
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Old 04-09-2007, 09:04 AM
Diesel Nut
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As an Amsoil dealer, let me say you should be just fine. You don't have to mix half and half or anything. Just run a good, safe engine cleaner (I use Amsoil's Motor Flush) and then drain and fill. I am doing my g/f's maxima right now.

The only time Synthetics pose a problem is when the vehicle already leaks. Typically, high mileage leaks ar from shrunk seals. Oil has swelling agents in it to help seals swell and seal better. If there is gunk built up around the seal, it won't the the additives to swell it, and it will dry up and shrink. Now you have a leak. Synthetics are very clean oils, in that they contain a large amount of detergents and cleaning additives, and they will clean any and all junk out, which will remove the junk from the seal, and you have a bigger leak.
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Old 04-16-2007, 11:11 AM
flutie845
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I have 2000 maxima I change to fully synthetic Mobil EP 5W-30 at 110000 with no problems at all.My car now runs cooler than before.Flutie845
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Old 07-27-2007, 05:58 AM
LBC-CarClub
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Quote:
Originally Posted by Diesel Nut View Post
As an Amsoil dealer, let me say you should be just fine.
I would say change to it, as long as you don’t have any leak issues. It is the best thing you can do for your car…

Amsoil is GREAT! My Dad is a dealer as well here in Indiana; and before he was a dealer, he used the stuff when in the military... He is retired now. Has been out for almost 18 years now. He was a mechanic in the military and that was all they used for there jeeps, trucks, hummers, plains, helicopters etc… He still is a mechanic and ASE certified.
All of my vehicles have Amsoil in them, and my Dad’s vehicles all have Amsoil in them as well… (We each have 6 vehicles) Great protection and great performance… Better gas mileage... Plus in the long run, much cheaper to use, since you have longer drain intervals… (Between 15,000-25,000mi or one year witch ever comes first.)
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