Last post on Sep 19, 2013 at 3:03 AM
You are in the Mazda Protege
What is this discussion about?
Mazda Protege, Sedan
Sep 19, 2001 (3:46 am)
I learned an important lesson during my ownership of one troubled, piece-of-junk, Ford-built Mazda B2300 pickup from 1994 to 2000:
"If it ain't broke, don't fix it."
Timing, temperature and compression are finely tuned in today's computerized engines. There's a reason certain plugs, filters and other components came with your car.
So many Mazda and Ford pickup owners have had numerous problems after installing non-spec K&N filters, "split-fire" plugs and aftermarket MAF sensors, and tampered with their exhaust dynamics in a supposed attempt to "boost performance." (Reference: "4-banger" board at www.fordranger.com) I say, if these people wanted higher performance in the first place, they should have chosen another vehicle.
Were those platinum plugs specified in your owner's manual as direct replacements?
I don't plan on changing any specs when I replace plugs, filters, or anything else on my 2000 Protege.
Just my opinion -- but I think it's an informed one!
#590 of 3742 Kudos to you Meade
Sep 19, 2001 (7:25 am)
Your $0.02 is worth a buck. Too many people try to upgrade performance of their vehicles with high performance air filters and plugs. Rarely is there any increase in performance yet drivability suffers. There is a reason that thousands of engineers are employed by auto makers and suppliers. they have to build a product that works well and stays that way. When you buy platinum plugs the increased cost of the item is nearly all marketing.
Stick with what works unless you know your stuff. Most of us, myself included, are not qualified to re-engineer our cars and if you think Bosch has really taken the time to do it, think again.
that's my $0.04
#591 of 3742 add my $1.00 to it
Sep 19, 2001 (11:37 am)
since I am an engineer and have worked with the design aspects of building up a machine.
DO NOT CHANGE THE OEM PARTS unless YOU HAVE SOME IDEA OF WHAT IT IS GOING TO EFFECT.
as mentioned, Spark plugs and air filters are the most common examples.
#592 of 3742 Inflation...
Sep 19, 2001 (12:21 pm)
Dang, from $.04 all the way to $1 in about 4 hours. Don't we all wish the stock market could do that these days?
#593 of 3742 Splitfires s***.
Sep 19, 2001 (7:24 pm)
I tried them in my '89 323 and it knocked like crazy. I took them out immediately and put regular cheap-o Champions (listed as OEM-spec) in their place. Runs fine now.
I'm not bothering with fancy spark plugs. Pretty much anything beyond the basic is all fluff.
Now, you can get sub-par air filters though. One I got didn't even fit (gasket barely compressed). Tossed it out. Oh well.
Sep 20, 2001 (6:59 am)
I tried to write my "if it ain't broke, don't fix it" post as diplomatically as possible, still expecting all sorts of negative replies. Now that I see everybody's on my side, I'll say what I really meant:
DON'T F--- UP YOUR CAR WITH NON-SPEC STUFF!!!
There. I feel much better now.
(Oh, and the missing word up there is "FOUL." What were YOU thinking?)
#595 of 3742 splitfire plugs
Sep 20, 2001 (4:36 pm)
I was ready to put them in my '96 Contour but the service manager talked me out of it. I came to trust this guy's auto savvy implicitly. Why I was tempted is because they're basically configured like an aircraft spark plug so obviously they must be better. (In my mechanically challenged mind)
Sep 20, 2001 (5:47 pm)
We've used Bosch Plat +4 in all of our cars needing spark plug replacement and they have seemed to improve engine performance. They did make an improvement in my 99 Accord w/ 30k just as they did in a 93 Civic w/ 130k. SO when my Protege gets ready for new plugs, Bosch +4's it will be.
Sep 21, 2001 (3:26 am)
You expressed interest in MAPP II several weeks ago, and I've been awaiting your e-mail. Are you still interested? If so, e-mail me at:
It's two weeks from tomorrow -- Saturday, October 6 -- in a northern Va. park. Hope you can make it!
#598 of 3742 black01coupev6
Sep 21, 2001 (7:09 am)
if you really think that the bosch +4 will make a difference, change them when your oem spark plugs are still going good. That way you will find out whether they REALLY make a difference.