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there has been much debate here in the past over whats better.
Some old school stick in the muds would tell you there is no benefit to synthetic.
I am an old school stick in the mud that feels there are.
It does have much better viscosity than conventional oil. It also withstands higher engine temps because of this.
I would only recommend a few synthetics though.
1 Amsoil
2 Motul
3 Mobil 1
4 Redline
If you wonder why I put Amsoil at the top its because its the one the is API rated for extended drain intervals. They also sell some of the best oil filters on the market that filter down to less than 1 micron.
Motul is a highly rated Formula 1 and Motorcycle synthetic. Not widely seen here in the states but availible.
Mobil 1 is the brand that of the easy to finds ones is the standout. It comes in right behind Amsoil and Motul.
Redline is not API rated. though it may be now? they have a great trans oil that is synthetic and is real good.
these 4 companies have been around a long time longer than any of the other major oil companies who jumped on the bandwagon due to competition from the 4 above synthetic manufactures.
Yes synthetic may cause oil leaks on higher mileage engines due to what has been stated above. though if you do use it will cut down on engine wear due to superior lubrication qualities.
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