I have a new motor home built on a Chevy Express 4500 Chassis. After driving through some hills towing a Jeep Wrangler, I stopped for gas and when turning the engine back on, I received the Low Oil Pressure - Stop Engine warning indication. The oil pressure gauge in the cab did indeed indicate 0 PSI oil pressure.
I pulled out of the gas station to park it in a better place and noticed the oil pressure fluctuating from very low to 40 PSI. I checked the oil level which was good (only 1000 miles since last oil change). I drove the motor home a few miles but the oil pressure tanked when I was at idle.
When the engine cooled off, I started it up and everything was good. Oil PSI between 30-40.
The RV was towed to a Chevy dealer as it is under warranty (only has 5000 miles on it). They could not replicate the problem. They suggested that it may have been caused by bad gasoline but didn’t explain how one could cause the other. After 2 weeks at the dealership, I drove it 225 miles home. Oil pressure indication was good all the way. I shut off the engine for a minute and restarted it. Oil pressure was at 10 PSI for a bit but rose when I revved the engine. Oil pressure indication is normal now that the engine cooled off a bit.
I would welcome your thoughts on this…