28-10-2019, 09:04 AM
Depends on the soundness of your radiator, hoses and top and side water connections to the engine!
I use a weak (25 to 30%)solution of blue stuff in my RK as it's used during the winter. The chummy has an expensive replacement honey-combe radiator that leaks prodigiously with antifreeze so that is drained during the cold months and the car stored away.
I echo David's comments, the anti-corrosion properties are worth having and the red stuff (Organic Acid Technology or OAT) is designed for modern aluminium/plastic radiators and is reputed to have adverse effects on solder on copper/brass/solder constructed rads.
One problem with the earlier cars with an external filler, is that if coolant is lost from the cap (for example, during heavy braking), this should be wiped off the paintwork as ethylene glycol makes reasonable paint stripper!
I use a weak (25 to 30%)solution of blue stuff in my RK as it's used during the winter. The chummy has an expensive replacement honey-combe radiator that leaks prodigiously with antifreeze so that is drained during the cold months and the car stored away.
I echo David's comments, the anti-corrosion properties are worth having and the red stuff (Organic Acid Technology or OAT) is designed for modern aluminium/plastic radiators and is reputed to have adverse effects on solder on copper/brass/solder constructed rads.
One problem with the earlier cars with an external filler, is that if coolant is lost from the cap (for example, during heavy braking), this should be wiped off the paintwork as ethylene glycol makes reasonable paint stripper!