“I decided to change to CFS 5w-40 NT as technical description seems even better than the oil I was using in my Alfa 156 1.8 ts and BMW K1200s 160 bhp model. Both fairly high revving. A higher viscosity oil is actually recommended in the Alfa however I prefer no too heavy an oil in high revving engines. I feel with CFS 5W-40 both vehicles seem to deliver a bit more power at higher rpm and run very smoothly. I have used high quality 5w-40 viscosity in all my vehicles over many years. I always run cold engines under light load until warmed up. I would empasise this is all based on my personal subjective experience. I am not making specific recommendations regarding other vehicles.”
“Runs great on the road in my mk1 MX5 so far with little to no HLA clatter, have yet to push it on track. Will try to update if does well or not when the time comes.”
“Switched from Castrol Edge to this and In reality you’re not going to know/feel the difference from brand to brand without lab testing imo. Used on a track going FN2, for what it’s worth.
However I can comment on the service from Opie which was fast and seemless, nice offer with the extra 1litre too.
Cheers, would use again.”
