If you are using Syntec in the US and you think it's Synthetic oil, you're being ripped off cause it's not.<br>

How do you know? I don't use Syntec...I use Mobil One...Is Mobil One OK?<br>BTW, where you been?<p>Steve S.<br>97 2.8QM

The SYNTHETIC BLEND is *not* fully synthetic, but the SYNTHETIC is.<p>Am I missing something?

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I noticed Castrol sells two products. A 100 percent Syntec which is the more expensive one. They have a cheaper one which is a blend.<p>Paul

Here's the scoop from a friend whose wife worked for Valvoline.<p>The EC (Euro Comunity) banned Castrol from selling the oil as "synthetic" because it was only partly synthetic (about 5%) and nearly all mineral oil. Here in US there is no law against marketing the product as synthetic oil and that's just what they are doing.<p>Most synth. oils are 95% poly alpha olefins which is the synthetic base stock of the oil. Castrol is only 5%.<p>They put the 5% in to pass specs i'm told.<br>

Hey, I use to live next door to a Polly Alpha Olefin! How did they make oil out of her? I wonder how much synthetic is in Mobil One. What ever happened to our resident chemists (Bill Shultz?) and oil experts (Sandy? Erik Bruce?).<p>Inquiring minds want to know.<p>Steve S.<p>P.S. Its probably like D5W....in the medical industry (Dextrose 5% in water)