It uses regular gas. It has an anti-knock sensor so that it is very
tolerant of gas octane. In any case, if you want to experiment, run a
tank of hi-test and a tank of lo-test on a trip at a constant highway
speed and see if you get better miles/$ with one or the other. Go with
the most economical.
The routine maintenance schedule and standard pricing is available on
Volvo's website at:
http://new.volvocars.com/ownersdocs/2004/2004_XC70/04xc70_00.htm
http://new.volvocars.com/ownersdocs/2004/2004_maintenance_charts/2004_mai
ntenance.html
http://new.volvocars.com/loyalty_v2/sm_02_t3.asp
My dealer publishes prices for each recommended maintenance. On my '01
XC70 the interval is 7,500 mi. The odd intervals are just oil & filter
changes. Then every 15,000 miles they check everything and replace
whatever is scheduled to be changed like belts or fluids.
