normal or synthetic oil
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Senior Member

Joined: Aug 2001
Posts: 650
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From: Missoula,MT
Vehicle: 2001 Hyundai tiburon
Hi i am about to hit 10k miles and wanted to switch over to synthetic oil. Is there any problems associated with synthetic oil such as cold weather,hyundai's run better on normal, etc...
Thanks
JD
Thanks
JD
dunno about general public, but i'm running synthetic and I love it. I'm using castrol synthetic 5-50, mabye a little overkill, but allows you to run your engine harder with less damage to the engine that if you used regular. The only problem is cost.
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I am running castrol syntec 10W40 here. No complaints but I think that 5-50 is actually hurting some performance because of the actual weight of the oil. But anyway keep in mind that once you switch to synthetic you can never go back to regular oil. Cold weather only affects oil weight. Like 5-50 you would not want to run that in the winter time. The max I would go is 10-30 in the winter and 10-40 in the summer.
QUOTE
....But anyway keep in mind that once you switch to synthetic you can never go back to regular oil. Cold weather only affects oil weight. Like 5-50 you would not want to run that in the winter time. The max I would go is 10-30 in the winter and 10-40 in the summer.
this is not true, why couldnt you go back and forth?you could mix them together(2qts reg, 2qts syn)hence syn blend. also you can use the 10w30 year round
Generally a engine w/ 10k miles on it doesn't need synthetic. I recommend synthetic with an engine that has over 60k as it would prolong the life and reduce wear. The reason you wouldn't want to use synthetic in a young engine is that the components need to break in with each other and they seat themselves over time. I believe synthetic hinders this somewhat so that i'm told.
Rich.
Rich.
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QUOTE
98tib:
nope you can't run both together. Just because it says it's blend don't mean if you put normal and syn togeth you get blend. It's not that simple. Yes you could use 10-30 all year round but why not go with the 10w40 in the summer.
QUOTE
....But anyway keep in mind that once you switch to synthetic you can never go back to regular oil. Cold weather only affects oil weight. Like 5-50 you would not want to run that in the winter time. The max I would go is 10-30 in the winter and 10-40 in the summer.
this is not true, why couldnt you go back and forth?you could mix them together(2qts reg, 2qts syn)hence syn blend. also you can use the 10w30 year round
I was told that you can use either and interchange anytime that you like. The newer syns are made to be idiot proof in that way. I guess in Europe its unheard of to use any type of conventional. The sooner the switch the better. Try a 5w-30 in the winter and a 10w-30 in the summer. Mobil 1 or Casterol are great.
Z?
Z?
OK.... There's a lot of confusion about synthetic v/s regular oil. I read from a tech. article that you can not mix synth. & regular oil in the engine at a particular time. And unlike what someone said you can always go back to using regular oil after using synthetic oil. Just don't mix them together, they have different properties. When I had my rebuilt engine installed I first put in regular oil to break in the engine and thereafter I have used synthetic oil. My engine has close to 15,000 miles and runs excellent. Mobil 1 is my choice.
Mike.
Mike.


