Suggested Dosage In industrial gear boxes use 25% to 50% for preventative maintenance and less power drain. If necessary use 50% to 100% to stop leaks and overheating. Motorway use is the easiest condition for oil, the speeds are fairly consistent and rarely push the engine hard, there is plenty of air flow to help cool the engine and the oil has a chance to get up to temperature and flow properly.
eBay