2013 Suburban 5.3L w/ 165k odo.
Vehicle is now my wife's daily driver and is short tripped. Once per week it gets on the highway (rural area) for ~37 miles round trip to the city. Rest is short trips in our little town 0.25-4 miles.
Changed oil with Havoline Pro DS 5w30 6qt box (Lifetime I think it says, or all mileage, marketing verbiage) about 1000 miles ago.
I got to drive last weekend and noticed hot idle oil pressure was around 23-26ish. Historically hot idle oil pressure is 37-38ish.
I changed the oil with the havoline DS Pro same as last time (bought the 3 pack) and oil pressure was back to normal.
Previous oil filter was Fram Endurance (been running them for several OCI's without issue. This time, due to convenience, I put in the O'Reilly Mictoguard premium. I really don't think it is filter related.
So, either fuel dilution from short tripps in cold weather, or perhaps the VOLM DoD spools/valves have some varnish?
A few oil changes ago I ran HPL EC. Did great at reducing oil consumption.
No sludge at last valve cover inspection, maybe 8 months ago.
Vehicle gets ~ 3k oil changes with full synthetic.
I have never had an issue running havoline Pro DS in the past, so I assume this is an engine issue. Prior to this Havoline I ran M1 ESP 5w30, and M1 HM 5w30.
Thanks
~C
Vehicle is now my wife's daily driver and is short tripped. Once per week it gets on the highway (rural area) for ~37 miles round trip to the city. Rest is short trips in our little town 0.25-4 miles.
Changed oil with Havoline Pro DS 5w30 6qt box (Lifetime I think it says, or all mileage, marketing verbiage) about 1000 miles ago.
I got to drive last weekend and noticed hot idle oil pressure was around 23-26ish. Historically hot idle oil pressure is 37-38ish.
I changed the oil with the havoline DS Pro same as last time (bought the 3 pack) and oil pressure was back to normal.
Previous oil filter was Fram Endurance (been running them for several OCI's without issue. This time, due to convenience, I put in the O'Reilly Mictoguard premium. I really don't think it is filter related.
So, either fuel dilution from short tripps in cold weather, or perhaps the VOLM DoD spools/valves have some varnish?
A few oil changes ago I ran HPL EC. Did great at reducing oil consumption.
No sludge at last valve cover inspection, maybe 8 months ago.
Vehicle gets ~ 3k oil changes with full synthetic.
I have never had an issue running havoline Pro DS in the past, so I assume this is an engine issue. Prior to this Havoline I ran M1 ESP 5w30, and M1 HM 5w30.
Thanks
~C