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Originally Posted by zksi
Apparently Calibre is made by Caltex which is good.
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I was just about to ask that one.... who actually make it. What grade is it? SN? SF?
I've used Penrite 10W50 in the commodore for the past 150,000km's with no issues (it's nearing 300,000km's now) and the Ford AU is currently on Penrite 5W40 but I'm worried about it being too thin so I'll put in 10W50 next time.
Strangely though Penrite have now changed from semi-synth to full-synth for their HPR range.