Well, Ive used BP Corse 30, and Agip Sint 2000 in the same race engine 12 years ago.
Corse Plus used to be the road going/longer mileage cousin of the race specific Corse 30 and Corse 50.
I see Corse Plus is now a 25W-60. It used to be a 20W-50. Must admit I haven't looked at it in 11 years since I discoverd synthetics.
Here's its PDS
http://tds-au.bp.com/bpglis/oztds3....4cd547c5ab3acd80ca256512007c73e4?OpenDocument
The Corse range used to be
the standard in race engine oils in this country from the late sixties through to the early nineties. Most engine builders I know of used to recommend it to their customers. It was used in everything from Formula Fords, through BDA's to V8's.
I used to use Agip Sint 2000 in '92 through a sponsorship from the six legged dog people. Our engine builder dynoed it for us and it was no better on the dyno than Corse 30, but we didn't have to pay for it.
Their gear oils seemed ok as well.
The big problem with Corse 30 used to be its intolerance of high oil temps. Keep it below about 110*C and it was happy. Over that and it 'fell away' really quickly.
A bit like Shell's XMO with XHVI. Get it warm in a race and your oil pressure and power would drop in equal amounts.
Hey, I used to use a 25W-70 Penrite HPR in an old Jeep 258 cu. in. six. Worked well on those plus 40*C days.
Rick.