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Old 10-17-2012, 08:26 PM
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RiggitanoLandscape RiggitanoLandscape is offline
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Join Date: Feb 2006
Location: Middletown, DE
Posts: 24
The Lubrizol is for the seals on the hydro's. It seems like when you switched out the oil that's the problem. On my mini z that I had, they were using the 10w 40 regular oil, then wanted everybody to go to the 20w50, the problem is synthetic oil does not have a W value or winter value. All synthetic oil is a 0 weight oil, the numbers are their for marketing purpose. Where the regular oil is a 40 weight oil, but will flow like a 10 weight when temps are below freezing. If you start off with regular oil, you should keep it because the seals will get use to having that particular oil inside the seals, The same is true on cars that switch to synthetic oil they start to leak on through the seals. You are probably sucking air through the seal on the filter housing which is why the pressure is dropping.
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