Originally Posted by 00wabbit
Sorry let me elaborate - Cummins ISL 400hp in a 2006 National Tradewinds Onan 8.0KW Diesel Gen. The unit does have a built in block heater. No access to 120v. I have to start it because we are planning to leave this area in January. It has a full tank of fresh diesel, but not "winter diesel"
Get a good fuel additive to put in the tank to prevent the diesels fuel from gelling or the inevitable water that's always in diesels fuel from freezing. Make sure you have the proper viscosity oil in the engine for the lowest temps you will be experiencing. This is very important. I personally recommend a synthetic like T6 Rotella but the key is to have the proper viscosity for the temps. Start the engine....both gen and coach. The oil pressure will be slightly higher than normal at first due to the cold temps of the oil but once it starts to warm up ever so slightly the oil pressure will be back to normal. Once you have this normal pressure and one you have proper air pressure slowly start driving the coach. Drive gently until all temps are in normal range. Do not just let the loach idle and run for a long period of times. Modern diesels do not do well idling and this causes soot to build up in your particulate filters if so equipped. The fallacy with letting a diesel idle to warm it up is that under no load it will never warm up to a normal operating temp. Drive gently and once temps are all normal drive like you stole it. The two keys are a fuel additive and proper oil viscosity for proper lubrication. Cheers, Jim