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General Information => Troubleshooting => Topic started by: cipo28 on September 30, 2005, 06:12:47 am
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...wich one is better for a turbo diesel engine (high mileage=300k), syntetic or regular oil? A mechanic told me that syntetic oil could produce leaks at the engine seals, I really don't know wich is good! Can you guys clear my mind, please?!!
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...wich one is better for a turbo diesel engine (high mileage=300k), syntetic or regular oil? A mechanic told me that syntetic oil could produce leaks at the engine seals, I really don't know wich is good! Can you guys clear my mind, please?!!
I've been running Castrol syntec 5W40 in my jetta (1.6TD) for over a year now and there haven't been any leaks. Only thing I noticed right away was that the car was more free revving and easier to turn over in cold temperatures. I think it is a lighter oil than the dino oil, and also not as thick when it is below 0 degrees outside. I have redline synthetic in my transmission as well and am also very pleased with that.
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Well, I haven't gotten the rabbit running yet, so I can't talk about it in particular.
But in my subaru with 200k miles on it, I run synthetic (5W-40) all the time. Much easier to start when it's below zero, and less valve ticking. I leave it about twice as long as non-synthetic which partly makes up for the higher price. As for leaking, it does leak a little more than 20W-50 does -- maybe the same at 10W40 non-synthetic (subaru's are a little notorious for leaking oil), but not enough to be a problem if you add a quart every 1000 miles or so. The easier starting in the cold is reason enough for me to use synthetic.