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i was at the shop buying some synthetic oil and one of the people asked what year and when i told him 02 he was like NO!! YOU WILL CAUSE MORE PROBLEMS THEN ANYTHING. he said its too good of a oil and it will blow seals and gaskets. so idk what to do because i want to swich over to synthetic but i dont want to be dealing with those type of problems. is this true?

 
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How many miles are you at?

 
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ive been using valvoline synpower for a year and now redline for 6 months. nothing bad happened to my 02 civic and it has 100k on it currently.

 
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i have 140k but i have never used it before. im just now switching over.

 
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I think the only problem that could possibly arise is if you had a small leak, it's probably gonna be much worse. Other than that, if the car is in good mechanical shape, you should be fine.

 
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its hard to say what your engine is like inside without knowing anything about how you drive and do maintenance. many factors can lead to a bad engine without you even knowing you did anything wrong. you could always run a treatment of auto-rx.com first and then switch to synthetic after its completed. synthetic should not cause problems in a good motor, no matter how many miles it has.

 
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ya i dont have any leaks only thing is a warped oil pan gaskit but it dosent leak at all my oil level is always about the same. and my car is babied i change the oil every 3k and plugs every 6k. i stay up with all my other fluids.but with that said i will probably do my oil pan gasket and search for anything else to be sure i dont have any probs. is there anything thing else im missing or should no.

 
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thats pretty much it. just do a regular oil change and fill it up with synthetic. most of them will go 10k miles easily so you may only want to change the filter at 5k miles. i normally just do mine every 10k miles/10 months together and never have a problem. you may want to watch the dipstick for a while after switching. i had some oil getting lost at first that seemed to go away after a while.

 
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The last oil change I did in my old civic (bought a nicer one) I used synthetic and that had 150k on it. Plus the engine wasn't in great shape. It was running but not too great. No leaks or anything.

 
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I've ran a few different things over the years. But I've mostly ran a synthetic blend or a full synthetic pretty much the entire life of the engine. I have a 140k now and still going strong. I think my oil pan gasket is starting to seep, but it's not dripping. So I'll leave it for a bit.

 
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Although not fully synthetic, I run mobil 1 every 3~5k ever since 35k miles
I'm nearly tippin 68k now

Engine feels smoother and quieter with it

 
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I used to use synthetic oil and changed every 8k-10k and never had a problem. Oh and I used 5-30 and I always though the motor was quieter than 5-20.

 
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^ Agreed, I'm running 5w-30 too
Only works in non harsh environments though, like the bay area :P

 
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I can honestly say M1 makes my Civic happy. The Max Life I have in there now isn't bad, but I can tell the difference from when I had the M1 running in there.

 
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ya m1 is what i will go with ill probably use 5w-20. has anyone noticed any mpg changes with using synthetic oil. i gess it should be better (so i heard).

 
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Doesnt effect MPG...

If anything, It's made me lose MPG due to my lead foot XD

 
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you will be fine. Maybe a possible leak or increased leaking if it leaks already.