I'm partial to Mobil 1 for both.
Any others you like?
I don't really have experience with many of the synthetics but I have hundreds of thousands of miles on Conoco products as well as Wix filters.
Jon
Wix/NAPA filters and Mobil 1 here.
Motorcraft synthetic blend and Motorcraft oil filter
Next question, do you change your own oil?
Next question, do you change your own oil?
I do except when traveling.
Change my own.
Mobil 1 (six quarts for $27.99 when on sale at Costco) and a Motorcraft oil filter ($4 shipped for Amazon Prime members).
For my generator I use Royal Purple.
An oil analysis offers general 'engine health' information; the test from Blackstone Labs is simple and inexpensive.
Blackstone Laboratories (https://www.blackstone-labs.com/)
I've always used the OEM Motorcraft FL 820S oil filter and Motorcraft 5W-20 per the owner's manual. I change the oil and filter every 3000 miles. Overkill? Maybe, but at close to 120,000 miles, the change interval and choices of oil and filter have been validated by very positive analysis results.
YMMV, as always.
When we had our LD, I mostly changed the oil myself. I mostly used Mobil 1 5W-20 and either a Motocraft FL820 or the Napa Gold/Wix equivalent. I tried for 3,000 miles, but felt confident going over using the full synthetic. A few times on long trips (like Alaska) we used Quik-Lube type places if they had a bay to handle the rig. Since we usually towed a fairly heavy Jeep, I had the transmission serviced fairly often, with a full fluid flush. The transmission work I had done by a local RV mechanic that I trusted. He always said the transmission looked good. I also checked the driveline parking brake fluid a few times. The engine and transmission never gave us a problem in the 140,000+ miles we had it.
Art
NB: For the last oil change on my 2003 (@118k), I used 5W-20 Valvoline High Mileage synthetic blend because Motorcraft wasn't available.
Amazon.com: Valvoline High Mileage with MaxLife Technology SAE 5W-20... (https://www.amazon.com/Valvoline-Mileage-MaxLife-Technology-Synthetic/dp/B00GZKC36I)
I was advised by a Ford Mechanic that the factory specifies Synthetic Blend because in RVs, which often sit idle for extended periods of time, the Dino oil component scavenges moisture better than synthetic while the synthetic lubricates better under heavy duty applications. This advice convince me to stick with the FoMoCo specified Synthetic Blend.
I was advised by a Ford Mechanic that the factory specifies Synthetic Blend because in RVs, which often sit idle for extended periods of time, the Dino oil component scavenges moisture better than synthetic while the synthetic lubricates better under heavy duty applications. This advice convince me to stick with the FoMoCo specified Synthetic Blend.
Thanks!
One can seldom go wrong sticking with the manufacturer's recommendations! ;)
Just a suggestion: If my motorhome is going to sit for a period of time, even a couple of months, it's "stored" with a full gas tank and fresh oil and filter; the tires are always covered when its sits for any time. I have never used a fuel stabilizer, but this may be a good idea depending on the climate in which the rig is located.
YMMV.