Very keen to hear some thoughts on this one. We currently have 5 old cars in the collection. I'm using 4 different engine oils, but wondering if I could simplify things and just run one common oil across all 5 cars? I appreciate the Torana may be slightly different, being the only "high performance" car.... but here goes:
The cars:
1. LX Torana, 383 Chev (450HP) - Castrol Edge 25/50 ("for big bore street machines")
2. EH Holden, EFI black VK 202 six (mild, lots of kms on the clock) - Castrol GTX 20/50
3. VS Berlina V6 (stock, daily driver, 200k on the clock) - Castrol Modern Engine 15/40
4. VS Exec V6 (stock, daily driver, nearly 300k on the clock, does use a little oil) - Castrol Modern Engine 15/40
5. VR Calais 304 5L (stock/mild with 230k on the clock) - Penrite HPR30 (20/60)
I'm not tied to brands, and I think a lot of people overthink oil choices and get caught up in the all the hype and need to run expensive synthetics etc. I'm more than happy with basic mineral oil. I just want to be able to walk in to any Autobarn / Supercheap / Burson etc and grab a well-priced oil. I'd happily use Castrol, Penrite, Gulf Western, whatever. Since Penrite is an Australian company, I am drawn in that direction.
It's more about the choice of oil viscosity. Since both our daily driven old-girl Commodores are now what I'd call 'high-mileage' - I'm thinking the move from a 15/40 up to either a 25/50 or 20/60 makes sense.
The EH also burns through a bit of oil these days. The Torana does too - perhaps due to larger than stock clearances.
The VR Calais (project car) is an unknown quantity as I'm yet to drive it.
Super tempted to pick some kind of 50 weight and run across all cars. Or should I just go for a thicker 60 weight and run something like Penrite HPR30 (20/60)????
Edited by LXCHEV, Yesterday, 04:10 PM.
