"Rust" color on plugs

srx70024

srx70024

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Joined
Sep 9, 2004
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Age
53
Location
Westfield, MA
I was inspecting my spark plugs tonite on my 01 SRX and they have a reddish or rust color to them. Is this any cause for concern ? Never seen that before. I put a new set of plugs in every season, these have about 800 miles on them. I always run 89 or higher octane.
Any ideas or suggestions ?

Thanks
 

Here is a little info on the reddish color of the plug

APPEARANCE: Spark plugs fouled by MMT (Methycyclopentadienyl Maganese Tricarbonyl) have reddish, rusty appearance on the insulator and side electrode.

CAUSE: MMT is an anti-knock additive in gasoline used to replace lead. During the combustion process, the MMT leaves a reddish deposit on the insulator and side electrode.

RECOMMENDATION: No engine malfunction is indicated and the deposits will not affect plug performance any more than lead deposits. MMT fouled plugs can be cleaned, regapped and reinstalled.


Don't know if this helps but thought I would pass it on.
 
what kind of oil are you using? my banshee plugs have a red tint to them too. but that started when i started to use amsoil series 2000 with race gas. (the oil is red) don't know if it's a concidence or something else?
 
There is a TSB regarding Maganese and SRX plugs. The BR9ECS can be partially fouled by Manganesse causing a lose of top end. I have seen this personally..my brother gained 14hp on the dyno by changing plugs..the sled ran perfectly. We had no idea that there was an issue. So, if the redish mean maganese I would change your plugs and take note of any performance gains (if there is any) and anytime you see a decrease in performance try your plugs first.
 
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