Posted by Jon Hagen on February 14, 2012 at 13:17:21 from (69.26.23.96):
In Reply to: Synthetic Blend Oil posted by dej(jed) on February 14, 2012 at 05:26:19:
Check out this link, clears up a lot of BS.
There is no reason you can't mix conventional oil with synthetic. I have put Mobil 1 in new engines and changet them to Mobil 1 synthetic with more than 200,000 miles with equally good results, no leaks with Mobil 1. If any of you remember when mobil 1 was sold in the black metal cans(30+ years ago) and said "100% pure syntetic oil" on the can ? That statement was followed by a little * At the bottom of the can, the * said "excluding additive carrier". The additive carrier was 5-10% mineral oil to keep the additives suspended in the Pao synthetic oil base stock.
Anyone remember Lifetime Lube? They made synthetic oil before Mobil 1 was on the market, but they could not keep the additives in suspension in the 100% PAO synthetic oil, something Mobil fixed by adding just a bit of mineral oil.
Hydrocracked grp3 synthetic oil is not quite as good as a grp 4 PAO, but it is a high quality grp 3 oil which is better than conventional mineral oil.
When other oil co's started selling grp 3 hydrocracked oils as synthetic oil, Mobil took them to court,claiming that only a grp 4 PAO oil could be called synthetic. Those other companeys stated that their hydrocracked mineral oil was very different and better than conventional mineral oil, so qualified to be called synthetic. The cort agreed, Mobil lost that one. I believe Mobil had found that if you can't beat them, you better join them or lose market share.
Mobil still sells Mobil 1 PAO synthetic in the silver lable (7500 mile) , or the gold lable with stronger additive package for 15,000 miles. Mobil also sells the cheaper "Super synthetic" to compete with the other hydrocracked synthetic brands. Mobil will not say, but Super synthetic appears to be a grp 3 hydrocracked oil instead of the grp4 PAO base of MObil 1.
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