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  #13  
Old 09-30-2014, 08:43 PM
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Re: Synthetic oil?

Back in the 80's I became an Amsoil dealer (but sadly did not grow the business beyond personal use) solely on the principal that 60+% (pick your source and % u believe) of engine wear occurs during startup/warmup and synthetic oil clings better to internals to minimize metal to metal contact especially in colder northern climates, blah blah....

No better way to coddle your motor IMHO especially if you keep your ride til near dead. Never had a motor even get tired on me with avg of 175k but the bodies certainly do.

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  #14  
Old 09-30-2014, 10:37 PM
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I switched cause these jeeps seem to run "hot" oil temps while towing or standing on the throttle alot and synthetic will hold up better under the higher temps. I still try not to go over 6k b/t oil changes. Even at the synthetic price its cheaper than a motor. But I dont worry if it goes a little longer.
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Old 10-01-2014, 11:38 AM
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Re: Synthetic oil?

I think an issue "for me" .. would be the tire rotation. I go 4,000 to 5,000 on a normal oil change and coincide the tire rotation. So - then if I go to synthetic - I'm not sure I would have the discipline to rotate my own tires. And then - I'm buying tires which is a lot more expensive than synthetic oil.
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Old 10-01-2014, 11:43 AM
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Quote:
Originally Posted by Jayhawk47 View Post
I think an issue "for me" .. would be the tire rotation. I go 4,000 to 5,000 on a normal oil change and coincide the tire rotation. So - then if I go to synthetic - I'm not sure I would have the discipline to rotate my own tires. And then - I'm buying tires which is a lot more expensive than synthetic oil.
Funny how stuff like that affects what we do with our rigs. I change my own oil as I trust no one else, never have (that's one of my many hangups) so my rotates r alone anyway and I have a good shop that rotates for $15.
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  #17  
Old 10-01-2014, 03:15 PM
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Re: Synthetic oil?

Quote:
Originally Posted by Paullee01 View Post
Brought the Jeep in for an oil change (I have 2 years or 4 oil changes free of charge, conventional oil) The dealer suggested that after that time I should use synthetic oil only. Why would they suggest using synthetic when the jeep uses conventional oil? When I asked the service rep that question he told me synthetic will keep the engine cleaner. In the manual it doesn't even mention using synthetic. Can someone tell me the advantages (if any) by switching to synthetic oil. I have 9000 miles on the Jeep and change my oil every 4500 miles.

What are my fellow jeep owners using?
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There is no reason to wait. There is also no reason to use synthetic if you are only going 4500 miles between changes.
Alas, oil is like tires. A lot of personal preferences. Consider this: if you are paying to have your oil changed then wouldn't it make more sense to use synthetic and change as recommended by the manual? It would probably save you time and money.
FWIW, I use Amsoil Signature synthetic. It only costs me $22 more per change (I do it myself) and I have no worries about changing it per the manual. Even when putting on 4000+ miles towing. If I used conventional oil and changed it twice as often then I would be paying $30(+/-) more per 10,000 miles driven.
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  #18  
Old 10-01-2014, 04:05 PM
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Re: Synthetic oil?

Quote:
Originally Posted by 14SummitHemi View Post
Back in the 80's I became an Amsoil dealer (but sadly did not grow the business beyond personal use) solely on the principal that 60+% (pick your source and % u believe) of engine wear occurs during startup/warmup and synthetic oil clings better to internals to minimize metal to metal contact especially in colder northern climates, blah blah....

No better way to coddle your motor IMHO especially if you keep your ride til near dead. Never had a motor even get tired on me with avg of 175k but the bodies certainly do.
STP Oil treatment works even better to protect your engine at startup than any oil...
proven by Baja Racers.

Not that it matters, the engine is designed for a MOPAR Oil Spec and change intervals noted in the Owners Manual. Oils that are labelled to meet that spec and change for non-severe duty or short drive/cool cycles [unfortunately I don't know of an oil life monitor that really checks this] are perfectly OK.

Yes, I am a synth junkie as well, but I don't really kid myself, as my engines regularly last several hundred K miles because they got TLC long before synth was even on the market.

I suspect the dealer is just trying to make a few more bucks on their express lane, either that or they would love to quit stocking two oil types for the same viscosity range since that does cost money.
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  #19  
Old 10-01-2014, 04:06 PM
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Re: Synthetic oil?

Quote:
Originally Posted by MDBones View Post
Funny how the dealer isn't mentioning the use of synthetic during your free oil change period.

LOL... Gee, I wonder why?
Care to bet that no dealer just uses synth for the "normal" oil to avoid the inventory costs and [in some states] taxes for having two barrels as opposed to one?

If I were the service manager and the total cost of regular dinopee ever got close to synth, I'd drop the regular for the cost/hassle savings alone.
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  #20  
Old 10-01-2014, 04:11 PM
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Re: Synthetic oil?

... snipperooty ...
Quote:
Originally Posted by Dawg View Post

On a related note, I was pissed at my dealer who offered a "free" first oil change that ended up being $50 with full synthetic. So disgustingly cheap that I don't use the dealer for any maintenance that is not free (warranty or recall).

Full synthetic isn't cheap, but damn---I just bought a 43k vehicle and you can't offer an oil discount on the first fscking oil change? Seriously?

Anyways, my 2 cents.
What!?!? I'd have asked for the used oil filter and stuck it... err somewhere highly personal on the service manager.

The full retail difference in cost even on the Hemi is less than $20 and I'd make an educated guess that there is good profit in that less than $20 difference.
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  #21  
Old 10-01-2014, 04:23 PM
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Re: Synthetic oil?

Quote:
Originally Posted by cduwan View Post
I was told (by a very reputable and trusted mechanic) to switch to synthetic because I use my Wrangler infrequently as a second car. I only drive it with no top, so am limited to nice days in New England and sometimes it sits for 2-3 months at a time. Never had problems
That, or worse very short drives, is one of the worst things you can do to an engine.
Synth helps, but even then short drives where it never hits full operating temperature is not at all good for longevity of the engine, the exhaust, etc. etc.

Rallying across the USA at 10+ speed limit on the other hand for weeks at a time, is quite benign.
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  #22  
Old 10-01-2014, 07:54 PM
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Re: Synthetic oil?

Quote:
Originally Posted by Jayhawk47 View Post
I think an issue "for me" .. would be the tire rotation. I go 4,000 to 5,000 on a normal oil change and coincide the tire rotation. So - then if I go to synthetic - I'm not sure I would have the discipline to rotate my own tires. And then - I'm buying tires which is a lot more expensive than synthetic oil.
I rotate at 8000 miles at the same time as my oil change. No issues. In fact, when I had the alignment checked while having my new tires installed, it didn't need any adjustments. And that was at just under 40K miles. Completely even wear on the old tires, too.
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  #23  
Old 10-01-2014, 09:37 PM
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Re: Synthetic oil?

Must be something to synthetic oil, Mercedes and Corvette factory fill with Mobil 1 and recommend it for every fill. I'm with them.
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  #24  
Old 10-01-2014, 10:05 PM
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Re: Synthetic oil?

I started using Synthetic in my Tahoe because I was towing a horse trailer for pretty good distances. I started at about 25k and the engine was still doing just fine at 90k when I gave it, the horse trailer and the horse to my daughter. However, the Tahoe would sit until I needed to tow or I went on a trip. I only used it otherwise if I had to haul something or the weather was bad (read in the winter). Driving my MX-5 was (and is) more fun.

My first oil change on the Jeep was called for on the EVIC at about 3800 miles which was just short of a year. I changed it out for synthetic at about 5000 miles right before I drove it on a 6000 mile trip which included off road. It's now at 12.5k and the EVIC says that I have 36% left. Since the Jeep sits in between trips (unless winter weather interferes), I think I'll stick with the synthetic.
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