I am going attempt to change the oil in my original front shock (for SS180). I have figured out the process, but I'm confused on the type of oil to re-fill it with. I have read all kinds of numbers: Mobil 62 (10W30 SAE), Shell Tella 13 (10W SAE), Shell Morlina 10 (10WSAE), or "motorcycle fork oil" 5W SAE.
Apparently the oil must have "seal swell" characteristics to cause the O-ring seal to swell for a tight seal around the shaft. The problem is that all the oils that I see currently available have additives to prevent seal swell.
Does anyone know of a simple, non-high tech oil I can use? I'm not racing and I'm not picky. I just do not want the rubber O-ring to disintegrate after I've done the work.