The higher end line of Bosch blades made in Germany are superb. Local blades made of silicone have also gotten good notices but they are even more expensive. I have not tried them. On the down side, Bosch does not offer inserts for their better blades.
Richard.
FWIW, my SOHC 1990 Protege has clocked over 100,000 miles on it's set of Bosch Plats and still gets the same fuel economy (34-37 hwy and yes, I log every tankful) even after 229,000 miles total. Original clutch, tranny and engine. Wish my Chrysler's were this reliable.
Richard
I got the Autolite Platinum Pro spark plugs from sparkplugs.com - not bad for UPS ground across the USA.
Question: The gasket has a smaller diameter surface and a larger one on each side. I called Autolite and they said it doesn't matter which way the gasket goes on the plug.
It appears that it would be better to mount the gasket with the smaller surface towards the plug and the wider surface towards the head... it looks like it will seal better that way.
Is there a steadfast rule for the proper orientation of the spark plug gaskets?
That's the problem with companies making it impossible for you to contact them, and throwing "Customer Service Representatives" (ignorant call-center drones) in your way.
Other way 'round. Small concave face towards the head, larger convex face towards the plug.
As soon as the guy said "hold on and let me ask", I knew I was in trouble.
Thanks for the advice. When it gets a little warmer in NY I will pop 'em in, with the washer properly oriented! :-)
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