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.
