Main Motorcycle: Triumph Bonnie 2012
Join Date: Sep 2012
Location: Windsor. Canada
|Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.|
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Actually the term synthetic itself is misleading. Several years back the oil companies were going after the true synthetic guys and the courts decided and I believe API, that you could use the term "synthetic" to describe your oil if it met certain specs. So, that means it can be labeled synthetic, yet be fossil based oil.
The last time I had it serviced the local shop put Amsoil in my Subaru WRX (I know, it's not a motorcycle, bear with me for a sec). I've always used dino in it and it just went over 100K miles. I am now getting a little oil seeping from the valve seals. The same thing happened to my Mazda MX6 when I tried synthetic after years of using dino.
Anyone know if a little extra seep from the seals a normal side effect when switching from dino to synthetic?
There are a lot of urban legends surrounding syn oils, but weeping seals on high mileage vehicles is a common known problem. If you call Amsoil and talk to them, they will (or at least they used to) not recommend you switching to syn if you have high miles on the vehicle.
Syn oils do an amazing job of cleaning out the crud in your engine. And one of those areas is worn seals. As I understand it, they can become packed with crud and when the syn cleans them out, they start to leak. I had a friend have this happen when he moved to Mobil 1 on his dump truck fleet. Each new truck used syn oil and when he only had a few old trucks left, he switched them to syn and they leaked.
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