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    Valvoline NextGen possible low oil pressure

    I drive a 2005 Chevrolet Silverado 5.3L and switched to Valvoline NextGen 5W30 about 4 weeks ago. I have never had an issue with low oil pressure, and it usually ran around 40. Now, I've noticed that at idle it runs slightly below 20 and will rise when under throttle, but never reaches 40...
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    Oil Recommendation for '05 5.3L Silverado

    I was wondering what some of you guys would recommend for a 2005 Chevy Silverado 5.3L Z71 with 179,000 miles. I have always used Castrol GTX but have wanted to switch to a synthetic for the longer OCIs. My driving is mainly short trips and city driving, with an occasional 300 mile highway trip...
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