http://www.atss.planet.ee/kolaladu/ford/Sierra-escort/cosworth_yd_information_handbook_1_0_(web).pdf
page 16: Oil: Comma Fully Synthetic SAE 5w50 or similar
page 30: First Oil Change 500 miles
I wonder what they mean by 'low speed tuition use'??
new spark plugs every 3000 miles!
max engine speed 8200rpm
My understanding: the oil change frequency depends on 2 factors:
. miles
. working duration
If you use your car for small travels, town, at low speed, duration increases vs miles and becomes more critical.By this way, Cosworth says you must change the oil on "high duty cycle use" requirement.
Cars use to have a miles requirement for oil change. But for industrial motors this is an hour duration requirement, by instance for farm tractor, trains, lawn mower etc...
