Of all the folks on this board, I can't believe I am the one that is going try and defend Castrol's position on their Group III synthetics. So here goes.
We have all heard the arguments about what is or is not synthetic, and we all have our different opinions on this. Let me try to clear something up about Castrol. Castrol has never had a refinery here in the USA. When they were using PAO as their base, they were buying it from Mobil, and they were getting fleeced on price. So they turned to two oil companies for a synthetic like base stock. Petro Canada and Shell. Up until 6 years ago, Castrol did not have a blending plant in the USA and Petro Canada and others blended and packaged the Castrol Syntec and their GTX line of oils. When Castrol purchased Dryden Oil they gained access to several blending plants, and when BP purchased them, they gained access to more. They now blend their oils but they still get their Group III base stocks from Petro Canada and Shell, depending on what part of the country your in.
It was a cost factor. It cost a lot more to sell oil when you do not have any control over the process, except the marketing of the product.
It's still a very good product.
We have all heard the arguments about what is or is not synthetic, and we all have our different opinions on this. Let me try to clear something up about Castrol. Castrol has never had a refinery here in the USA. When they were using PAO as their base, they were buying it from Mobil, and they were getting fleeced on price. So they turned to two oil companies for a synthetic like base stock. Petro Canada and Shell. Up until 6 years ago, Castrol did not have a blending plant in the USA and Petro Canada and others blended and packaged the Castrol Syntec and their GTX line of oils. When Castrol purchased Dryden Oil they gained access to several blending plants, and when BP purchased them, they gained access to more. They now blend their oils but they still get their Group III base stocks from Petro Canada and Shell, depending on what part of the country your in.
It was a cost factor. It cost a lot more to sell oil when you do not have any control over the process, except the marketing of the product.
It's still a very good product.