hi guys,,,about 8 years ago i had a stuffed gs1000 motor ,,,it ran like a charf cutter... you could not stay in the garage with it coughing and carrying on,,, i picked up 4litres of shell sx4 sythetic fortified put it in the gs1000,, and 5 mins later no smoke .....so no all i ever use is shell sx4 20-50,,, also its not a pure syth.. oil so if you caught in a small town and low on oil.. you can put a good mineral oil in to get you home without stuffing your motor.. there are other good brands of fortified oils that you can use as well hope this helps you regards oldbiker