I have a 2012 Suburban 1500 with the 5.3 LS engine. 171,000 miles, original owner. Started using oil at about 100,000 miles and now uses a quart anywhere between 500 and 2000 miles depending on what I'm doing (faster when towing a heavy trailer through the mountains, slower when less heavily loaded). I've had recurrent p0521 check engine light warnings since June 2020. It is not the sensor or the screen and I've verified pressures with an analog gauge. My engine is likely just decently worn after fairly heavy use.
I just installed a UPF48R filter instead of the default PF48e after seeing the GM TSB recommending this step when a p0521 error persists. I can see pressure is higher with the UPF48r.
But, I'm not understanding what it is about the UPF48r that results in a higher pressure than does the PF48e? Clearly it is some difference due to the filter, as otherwise GM would not recommend using the UPF48r for this case. But how does the UPF48r filter result in the engine operating at a higher oil pressure than does the PF48e?
I'm an engineer and am curious to understand physically how this change helps increase oil pressure. Thank you for your input.
I just installed a UPF48R filter instead of the default PF48e after seeing the GM TSB recommending this step when a p0521 error persists. I can see pressure is higher with the UPF48r.
But, I'm not understanding what it is about the UPF48r that results in a higher pressure than does the PF48e? Clearly it is some difference due to the filter, as otherwise GM would not recommend using the UPF48r for this case. But how does the UPF48r filter result in the engine operating at a higher oil pressure than does the PF48e?
I'm an engineer and am curious to understand physically how this change helps increase oil pressure. Thank you for your input.