Quote:
Originally Posted by glang
Id say a total success! Only comment is on the spark plug changing and Im the same as you but I think why the manufacturers recommend frequent changes (apart from profit  ) is that the inner ceramic has quite a hard life up to 500º and down again a gazillion times a minute. Because of this theres a risk it will break up at some point which wouldnt be good for your engine... |
Agreed, but very close inspection of the ceramic around the centre electrodes on all the used MR8E plugs I've replaced has shown no evidence of cracking / breaking-up / erosion.
In my 2017 version of the owner's manual, it actually gives two service schedules, one for the US and one for 'rest of world.' The plug change schedule is given as 7.5K for the US, and 15K for 'rest of world.' (The US oil change schedule is also 3,750 miles, compared to 7.5K for 'rest of world').