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i know there is a sticky about this but i am curious about what people think about it and i dont want to fill up that thread with this stuff.

so,

what is everyones opinion about synthetic oils. oil change intervals, brands, why you use it, why you dont use it, etc.

no need to try and convince me to use it i use it in my neon and my fiances beetle and will strongly consider it for all of my future vehicles.

alright fist in the poll.
well i know syn oil is good for all applications. only bad thing ive heard is that if you have high miles in your car and you change to syn then you might run into small leaks. but over all syn oil is supposed to protect your engins internals at high heat temps when convensional oils fail. i myself ran full syn for about 15k miles then swiched to synblend due to my budget. but yeah i would rund full syn anytime for any application.

I switched over to synthetic at 60k. I haven't had any leaks thus far.

good in almost modern car withouth a bazillion miles.

thanks for real responses guys. i posted this in the 2nd and 1st gen forums on the other org and this one tool in the 1st gen forum gave me the search this has been discussed a thousand times answer.

the syn in a high mileage oil is a partial myth. engines that were meticulously maintained for the beginning of their life generally have no problems with synthetic oil. but engines that were neglected for the beginning of their life are the ones that generally run into problems.

^^^

i have a '77 winnebago motorhome with a 440 it has had the engine rebuilt once already. we are quite the meticulous family when it comes to care maintenance and it had started to leak oil some what when we switched over to synthetic. it only has 75k miles too

racer12306 wrote:thanks for real responses guys. i posted this in the 2nd and 1st gen forums on the other org and this one tool in the 1st gen forum gave me the search this has been discussed a thousand times answer.

the syn in a high mileage oil is a partial myth. engines that were meticulously maintained for the beginning of their life generally have no problems with synthetic oil. but engines that were neglected for the beginning of their life are the ones that generally run into problems.

then its safe to say its true for neglected cars or even some pre-owend cars.

i would say yes. that is why i believe it to be a partial myth. people that buy used, neglected vehicles and put syn in it and have problems believe that it is true. but people that decide after a while to put syn it and it still runs great believe it is false.

that is an odd case tamadrumr88. it might have something to do with the age of the vehicle, but im not sure. hope you got the leaks sorted out and its happy now.

one thing i have heard to do is to use a product called autorx. it cleans out the engine and has seal conditioners in it that revive the seals and then you put syn in an engine even if it was neglected a little and it should be happy. that is what i see the stuff as able to do from what i have read, dont have any first hand experience with it.

Ok, here is a little research that I found on why some people have probs with switching to synthetic in a car that was run with regular oil for a lot of miles.

Regular oil contains a lot of minerals and stuff like that that can "plug" small gaps and holes in seals over time. When you change over to synthetic that does not contain these things....the minerals and such that were plugging those small areas is flushed out, and therefore small leaks can occur.

I ran regular oil in my 2.0L and never changed over to synthetic due to cost.....I had 131,xxx miles on that motor when I swapped motors, and never had a single leak.

I run Mobil 1 Full Synthetic in the SRT motor that has only 14,xxx miles on it, and no leaks from that either.

I say to switch to synthetic, and if you do run into small slow leakage problems....you can always switch back.

Josh

EvilCreations wrote:Ok, here is a little research that I found on why some people have probs with switching to synthetic in a car that was run with regular oil for a lot of miles.

Regular oil contains a lot of minerals and stuff like that that can "plug" small gaps and holes in seals over time. When you change over to synthetic that does not contain these things....the minerals and such that were plugging those small areas is flushed out, and therefore small leaks can occur.

I ran regular oil in my 2.0L and never changed over to synthetic due to cost.....I had 131,xxx miles on that motor when I swapped motors, and never had a single leak.

I run Mobil 1 Full Synthetic in the SRT motor that has only 14,xxx miles on it, and no leaks from that either.

I say to switch to synthetic, and if you do run into small slow leakage problems....you can always switch back.

Josh

that was my kinda my point.
conventional oil molecules and minerals are bigger than the full syn molecules. syn oil has smaller molecules that reach parts that regular oil cant and is also better absorbed in the microscopic crevits on the walls of the internals. so when frictions occures the internals are more protected by a thin film of oil.
syn oil is processed and filtered numerus times to get the cleanest most pure oil molecules wich is called synthetic.