Yes, you can use synthetic without any problems.

only time it will 'hurt' the motor is if there was under 2k miles on it. (new/re-built)

even though the car has never used it before(68k) ?? why would he say it would ruin it?

The reason people are sometimes reluctant to switch in a high mileage motor is synth has smaller particles, so tiny leaks that were blocked with dino might start leaking with synth. I won't hurt anything, just might uncover existing problems you didn't know about.

ok so after reading what "kyledykstra" said what would you suggest?

mitsuclipsegsx said:

i just bought my 2g GSX and the guy i bought it from said he never put synthic oil in... him or the pervios owner, it has 68k, can i still use mobil syn, ... he said if i did it would hurt the engine?

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He's full of crap. But so are those who think synthetic is any better on the street than conventional motor oil. Just replace it at 5,000 miles and put on a new filter every other change. Spend the money you save on the next motor, which you won't be needing until the savings have added up that far.

dave99gst said:

only time it will 'hurt' the motor is if there was under 2k miles on it. (new/re-built)

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And I don't even buy into that statement all together either. IMHO, the only reason not use synth on a new motor is- who wants to deposit all that break in material into expensive oil?

Defiant said:

He's full of crap. But so are those who think synthetic is any better on the street than conventional motor oil. Just replace it at 5,000 miles and put on a new filter every other change. Spend the money you save on the next motor, which you won't be needing until the savings have added up that far.

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I just bought a 1992 Talon TSI AWD with 155000 kms on it and judging by the service logs never had synthetic. I immediately changed it to synthetic with no problems or leaks.

I have to disagree with Defiant a bit. Synthetic oil in an N/A engine may be overkill but in a turbocharged engine isn't. There's a reason that new EVO VIII's come with mobile 1 as synthetic doesn't break down at some of the high temps a modded turbo engine may be subjected to like mineral based oils can. Also in winter when temps. can get as low as -35 deg C it makes a huge difference when starting a cold engine as synthetic flows far better at low temps. Synthetic oil handles the temperature extremes better, its a fact. Using synthetic oil is more of a "piece of mind" thing as your engine may or may not last longer by using it but if it does, it's worth it.

kyledykstra said:

The reason people are sometimes reluctant to switch in a high mileage motor is synth has smaller particles, so tiny leaks that were blocked with dino might start leaking with synth. I won't hurt anything, just might uncover existing problems you didn't know about.

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^^^ Yeah, he's right. ^^^
This is the only reason people recommend NOT to switch to synthetic. The rule of thumb has tipically been 70K miles. If you have less than 70K, then it is OK to switch. It is not a garuntee, it is just an average or rule of thumb.....
I made the switch to synthetic when I was at 59K two years ago and I've been good ever since. I only have 69K on it now.

You should be OK to switch if you want to.

"99gst_racer Quote:
Originally Posted by kyledykstra
The reason people are sometimes reluctant to switch in a high mileage motor is synth has smaller particles, so tiny leaks that were blocked with dino might start leaking with synth. I won't hurt anything, just might uncover existing problems you didn't know about.
^^^ Yeah, he's right. ^^^
This is the only reason people recommend NOT to switch to synthetic. The rule of thumb has tipically been 70K miles. If you have less than 70K, then it is OK to switch. It is not a garuntee, it is just an average or rule of thumb.....
I made the switch to synthetic when I was at 59K two years ago and I've been good ever since. I only have 69K on it now.
You should be OK to switch if you want to. ""


Thanks i am going to switch

91boost said:

And I don't even buy into that statement all together either. IMHO, the only reason not use synth on a new motor is- who wants to deposit all that break in material into expensive oil?

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another good reason is
the rings will not seat and your new motor with all that expensive will have lower compression than if you the dino oil.

heavyD said:

There's a reason that new EVO VIII's come with mobile 1

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Yes. It's called "Money From Sponsors". You can bet Mits gets that oil for free -and a large amount of money besides- just for telling people it's in there. Same with Duracell batteries, toothpastes dentists prefer most, Tylenol and on and on.

as synthetic doesn't break down at some of the high temps a modded turbo engine may be subjected to like mineral based oils can. Also in winter when temps. can get as low as -35 deg C it makes a huge difference when starting a cold engine as synthetic flows far better at low temps. Synthetic oil handles the temperature extremes better, its a fact.

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True that synthetics have better extreme-temperature characteristics. Which is what additive packages do for mineral-based oils. Synthetics do have better cold-flow properties. Which is great if you're in that cold an area, but few of us are in Antarctica, and even in Canada, cars have been surviving -often with the simple expedient of a block heater- for longer than synthetics have been around. For the heat end of things, a healthy DSM cooling system handles Earth just fine, even out in Arizona.

Using synthetic oil is more of a "peace of mind" thing as your engine may or may not last longer by using it but if it does, it's worth it.

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And thousands think it does. Which isn't a terrible thing.

I've always felt the same as Defiant seems to. Marketing hype.

I switched to Mobil 1 at around 120k miles because i'd heard it helps lifter tick. My car does feel like it runs a little better (not super noticeable, but a little). But more importantly, my lifters don't tick anymore. I tried every other regular oil before that to try to get them to stop with no success until the Synthetic... so to me it's worth it.

I switched to synthetic Mobil 1 when I bought my car with 120,000 miles and it does run a little cooler according to the temp gauge. I guess it might run a little better, could be my imagination though.

Oh yeah, bhop what weight of Mobil 1 did you use to help lifter tick. I've got some lifter tick.

bowerboy_1 said:

another good reason is
the rings will not seat and your new motor with all that expensive will have lower compression than if you the dino oil.

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That is really the old school way of thinking, IMHO. Explain why alot of new cars come with synthetic from factory....

Running a synthetic motor oil will help prolong the life of your turbo, as synthetics have an excellent resistance to sludging, coking, and varnish deposits. But if you change your oil frequently at proper intervals, the above shouldn't be a problem with regular motor oil. Even with synthetic oil, you still should change it at the same intervals because even though the oil doesn't break down, the additive package does, and you want to remove the contaminants in the oil, too.

I only have one thing to say synthetic is a form of cheap insurance i have always used mobil one. ya its more expensive but u get what you pay for. examples


all cars well matinced with no mods
1. 92 ford tempo 275000 miles still running strong
2. 85 chevy blaze 376000 miles still ran when sold last month
3. 90 nissan 240sx 200000 miles still a bad ass car.

nothing speacal done to any of these just daily drivers well mantied oil and filter changed evey 3000 miles great vehicles. as some people say u dont need to change the filter every time. well for 4.65 a filter does it really matter? thats my 2 cents on that

bob_green said:

as some people say u dont need to change the filter every time. well for 4.65 a filter does it really matter? thats my 2 cents on that

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Ah, but a "dirty" filter will filter better. Its passage size will have been effectively reduced, if it found anything big enough to filter in the first place (which it probably didn't).

Defiant said:

Ah, but a "dirty" filter will filter better. Its passage size will have been effectively reduced, if it found anything big enough to filter in the first place (which it probably didn't).

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True, but filters were designed to operate in the middle between great filtering and great flow. If you improve the filtering by using a dirty filter, then you are simply exacerbating the flow. It's a simple trade off.