Plug color and fuel power

[Russell]

Changed my plugs after 31,000 miles. Only about 6,000 with FP in every tank. Mostly Chvevron 93. Some Shell Vpower fuel.

Plugs very clean with light tan deposits. In bright light the deposits has a greenish tint. is this the Fuel Power or gasoline? Just wondered.

I thought the plugs were excellent for a car with 111,000 mile, uses no oil between 4-5,000 mile oil changes

 

[BlazerLT]

What car?

 

[mechtech]

Modern fuels don't color plugs like they used to. The rules/parameters have changed.
They can be almost white, and be correct.

 

[Russell]

1995 BMW 525i m50tu 2.5 liter six. For some reason my signature is not posting.

 

[benjamming]

Signatures are no more.

 

[Bio-T]

quote:

---

Originally posted by Russell:
1995 BMW 525i m50tu 2.5 liter six. For some reason my signature is not posting.

---

Signatures

 

[mjo]

The greenish tint might be copper oxide.

 

[Matt_S]

The greenish tint could be copper from the metal of the plug electrode. If so, and especially if you need bright light to see it, it would be normal wear and wouldn't mean much.

 

[V1]

What part of the plugs was tan colored?