I know that this will help bring up oil pressure, but is it to thick to use in our motors? It gets to about the 90*F-100*F here in NJ during the summer. The engine has about 30,000 miles on it.

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

"Why ride a stang when birds can fly?"

http://www.geocities.com/thegta

 

IMHO it is too thick. I prefer the 0W-30 or 5W-30 Mobil 1 myself in my 400.

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"So many Mustangs, so little time..."
ICON Motorsports

 

I run 5w50 Castrol in all my vehicles year round. v6, 305ci and thumper my hopped up 400ci.


Bear Tracks

 

I run mobil 1 15w-50 all year in my Firebird and Maxima. The Mobile 1 15w-50 is about the same viscosity as regular 5w-30 it seems.

 

Joseph,

Well...running 15W-50 in synthetic is better than say running a conventional 15W-50 in your car.

The synthetics have a more uniform molecular structure, and tend to get into clearances a bit better than their conventional counterparts.

For your engine and geographic location, most of us would recommend between 5W-30 and 10W-30 synthetic, or even possibly the 0W-30 mentioned above. I use 10W-30 in both my cars year round in Illinois,

I would shy away from the 15W-50 in the winter with your engine. But as I said earlier, It being synthetic kind of changes what people would recommend. all in all, you should be fine since it has a better "pour rate" than conventionals at the lower temperatures you will see in NJ during the winter months. If it were me, the next oil change would be something slightly thinner.

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86 Trans Am WS6 Black with tinted windows, shaved door handles
ZZ4, Mini-ram, true duals, LT4 HotCam, AFR 195 heads.
***Too many other mods to mention***

"In the future, cities will become deserts,
roads will become battlefields, and the hope of mankind
will appear as a stranger" The Road Warrior

 

I run delo 15W-40 year around and haven't had any problems. The climate here runs from 10* in the winter to 105* in the summer