I've used Comma G30 in my 2011 Plus 4 with super sport engine (Mazda MZR which is essentially a Duratec, an MX5 engine) for over 5 years since fitting my Mulfab ali rad. It is recommended to use an OAT antifreeze, i did change it in 2019 during routine maintenance using a 50/50 G30 and distilled water, no problems over this period.
I also use it in in my K series engined Elise which has something of a reputation for cooling issues, been using it for over 8 years 73k on the clock and no HGF issues or overheating. It is worth noting of the 2 companies Lotus and Rover one recommends OAT and the other recommends non OAT.
Unfortunately, OAT coolant shouldn't be used in Ford Crossflow engine due to its propensity to damage the older types of gaskets and seals.
Arwyn
