All, Well, I've done it now. I brought home a new class A. Mine is on the FORD F53 chassis. The oil fill cap & owners manual state it is to use 5W20 motor oil ? WOW! That sure is thin....
Second question about slides. Again IMHO. We park at home whenever we are not on the road, and have toppers over our slides. If the weather is going to be bad, storms or snow, we usually keep the slides in. No worry about the mechanism, as both slides are hydraulic, and the rollers are protected underneath. more worry about weather exposure for the canvas toppers, and seals. and/or leakage around the tops of the slides.