Modern Vespa

Just finished winterizing three of our four scooters. I left my Reflex road ready just in case we get some decent weather over the next few weeks. After cleaning everything up and putting tools etc away I realized that I bought (and used) 15w-40 oil!
It's the same brand - Rotella that I always use. I'm not worried about the other two scooters but putting the "wrong" oil in my BV200 has me thinking. Anyone care to offer some thoughts?

Bob

Some people prefer a closer number between the two as it puts less demand on the additives within the oil, so a 15w40 will be more stable than a 0w40 long term.

All depends on the climate you're in really. A 15w40 will take longer to warm up, so isn't as good for very cold climates - but as you're winterising your bikes, you're probably not using them in cold weather anyway?

A 15w40 is also better if you've got any leaks etc as it won't leak as much.

Once warmed up, it should theoretically be no different to a 5w40 as the first number is only the cold rating.

If riding in the cold, maybe be a bit gentler for the first couple of minutes riding - but this isn't something I'd be concerned about.

Outdoor ambient temperature vs oil grade.

Thanks for the reply. I was thinking on the same line. That scooter is not used in cold weather anymore. If I ride when it's cold I take the Reflex it has a windshield. The 5w-40 comes in a blue container and the stuff I bought came in a silver container. Guess I have too much on my mind... either that or I'm starting to lose it.

Bob