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#41
07-15-2002, 05:00 PM
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Castrol GTX 10-40 in my Pontiacs.
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"Everyone is entitled to be stupid sometimes, but you're abusing that privilege" www.musclecargalore.com [www.reverbnation.com/nikivee 1967 Pontiac GTO 1967 Pontiac Grand Prix 1972 Pontiac Lemans Sport Convertible 2015 Dodge Challenger Scat Pack 392, 6 speed 2021 Ford Explorer |
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#42
07-15-2002, 11:33 PM
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WOW....the resurrection of a 2 year old post...... Good job!
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#43
07-16-2002, 03:22 PM
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I have been running Coastal (or whatever the house brand is) 10-40W in all my vehicles for about 23 years. Zero issues, all make good pressure and look good on teardown. My reasoning is it all comes out of a few refineries and there probably isn't a huge delta between brands.
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#44
07-17-2002, 01:49 AM
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I've switched from 20W-50 Valvoline to Castrol 10W-40 in two different cars now, and both picked up 8-10 psi of oil pressure across the board, both cold & warm. I have two friends who had told me they experienced this very same deal when switching to Castrol in their vehicles. I told them they were full of, well, you know, and figured I'd try it for myself. I ate my words on that one.
 Anybody have any ideas why this happened? Also, the Castrol seems to be much cleaner compared to the Valvoline when I change the oil. More detergents, maybe? 
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