About five years ago,Mobil was the largest producer of PAO's,not so sure where they stand now. Redline makes an excellent oil,however,since it is almost entirely Ester based,I would be careful in using it in a passenger motor vehicle as Esters will attract moisture. In a race engine, it is not an issue as moisture will evaporate with the high engine temps created and/or the oil will be dumped at very short intervals such as after a race.In an every day car,it could become a problem.
When using any filter using an Ester based oil,you should not go more than a year on the filter for the Ester can break down the media. This is especially important when using the less expensive filters but holds true of any filter used.
Amsoil buys its base stock mostly from Mobil,but,also from Petro Canada and Lubrizol. When they get a shipment, Amsoil will test it to make sure it is to their specs. On one occassion,it was below specs and the entire train load was sent back. That happened once and one time only.
Oil manufacturers are laughing all the way to the bank with their greatest marketing scam which they coin "synthetic blend". There are some very smart people on this forum,however,I am shocked at those that use this oil. Unless it is stated on the bottle or their website,we have no idea on the percentage of synthetic oil in the container. The words "synthetic blend" is misleading to the public where most will assume its a 50/50 blend. It was stated in a court case years ago,that to be called a "synthetic blend",the oil must be a minimum of 5% synthetic.
Would you trust this in your modern engine with Direct Injection,high compression,low tension rings,VVT, turbo,twin turbo,and other technologies I am omitting? Conventional oil will not hold up and neither will this. The new classification of oils coming are not only to address the issues we are seeing with these motors,but,for the new and hotter running engines coming off the assembly lines.
