Repco full synthetic 5W-30 C3 engine oil is a high quality, low viscosity multigrade engine oil, designed for use in late model petrol & light duty diesel engines including those fitted with a Diesel Particulate Filter (DPF)
Equivalent to $35.80 per 5L bottle
This is the high spec C3 oil with lower SAPS (sulphated ash, phosphorus and sulphur) so it can be used on vehicles with DPF's
Unless they have changed OEM's, Repco oil is made by Penrite in Australia
They've also got this 20L 5w30 Synthetic for a few bucks more. Does anyone know the difference?
https://www.repco.com.au/en/oils-fluids/engine-oils-fluids/e…
C3 vs RFS5?
edit: looks like OP's one (C3) is more suited to diesel cars, and this one (RFS5) is more suited to Unleaded turbo's and non-turbos.
Putting in my car plate tells me the C3 isn't suitable, and the RFS5 is. $157.60 / 4 = $39.40 (for an equivalent 5L bottle). Not overly competitive considering the volume you're purchasing. OP's deal gets a plus vote for the C3 specific oil, but there's better to be had for other users.