I would presume that the Jaguar recomendations refer to frost protection as they quote different concentrations for Europe and North America. Maybe the minimum 25% refers to corrosion protection.
Yes, anyone had experience with waterless coolant?

I have always understood that leaks are more likely when antifreeze is present in the coolant. Maybe difference between 25% and 50% isn't relevant. The only references that I can find regarding concentration refer to level of protection against sub zero ambient temperatures.

I've just had the radiator on my series 1 XJ6 4.2 re-cored and having flushed out the system need to re-antifreeze. Using "Comma Super Coldmaster Concentrate" ( blue ) and wondering what concentration to use. Interested in it's anti-corrosion properties rather than anti-freezing. ( after all we'll n...

Thanks for the responses. According to the Jaglover site it may not be a mercury switch and could be a ball switch. As a sealed unit not easy to tell which though when I replace it will I be able to resist further investigation ? - probably not a good idea if it is mercury! At least the MOT tester m...

Lock down has provided time to investigate those forgotten jobs. My boot light has never worked since I've had the car - 1971 series 1. There is a 12V supply to the bulb holder but not at the contact inside with the holder. Discovered an in line item in the bulb holder which is a perspex cylinder wi...

This is my cats preferred choice : Morris Lubricants Golden Film SAE 20W-50. Normally retails around £16 / 5 litre. Check out the Morris website. I'd prefer to buy my oil from a lubricant specialist who will provide a product data sheet rather than Halfords whose idea of a specification is " for use...

I'm thinking of fitting a heated windscreen as my original is peppered with micro chips and I hear of poor fit problems with standard triplex screens. Have any members had any experience with the heated screen sold by Paul Castaldini?