Against my better judgement...

[PenguinLTZ]

...I have purchased a set of Bosch Platinum +4 spark plugs for my Tahoe.

The 'hoe rolled 65K, and with all the idle time from remote starting while in AK, I figured it was time for her first tune up. The last tank of fuel yielded only 11 mpg.

I had the trans flushed with Dex VI, changed the oil, changed the fuel and air filter, and tomorrow I will change the plug wires and the plugs.

I had always ran the Bosch Platinum plugs in my old hot rods, since heat range was so broad on them, and I loved them. I have used Bosch wires in several vehicles, with great success, and feel the price is average for a good wire.

With all my later model Chevy/GMC trucks, I only deviated once from using the tried and true Delco platinum plugs, and I regretted it. I put Autolite Platinum plugs in my 8.1 and the mileage was cut in half!

Well, we will see what happens after I run a couple of tanks through the ol' girl, and see if I just made a $6 per plug mistake

 

[Bigredmariner]

I'll watch this one because I have always been leery of using anything but AC-Delco plugs. Keep us updated.

 

[Stumpuller6.5]

hopefully they net better than 11mpg. heck i can get 11mpg!

 

[PenguinLTZ]

hopefully they net better than 11mpg. heck i can get 11mpg!

Yeah, it was in town with a lot of A/C action, but definitely not normal!

 

[PenguinLTZ]

I'll watch this one because I have always been leery of using anything but AC-Delco plugs. Keep us updated.

I went to 3 stores, and nobody had any Delco platinums. AutoZone had the Iridiums for $11, but I thought I would give these a shot...should be interesting.

 

[DV2000NJ]

I'll watch this one because I have always been leery of using anything but AC-Delco plugs. Keep us updated.

I went to 3 stores, and nobody had any Delco platinums. AutoZone had the Iridiums for $11, but I thought I would give these a shot...should be interesting.

I'm pretty sure they stopped making the Platinums a few years ago and switched over to the Iridiums (that's why the OEM gap changed from 0.06 to 0.04 some time during the run of the GMT800s).

 

[PenguinLTZ]

I'll watch this one because I have always been leery of using anything but AC-Delco plugs. Keep us updated.

I went to 3 stores, and nobody had any Delco platinums. AutoZone had the Iridiums for $11, but I thought I would give these a shot...should be interesting.

I'm pretty sure they stopped making the Platinums a few years ago and switched over to the Iridiums (that's why the OEM gap changed from 0.06 to 0.04 some time during the run of the GMT800s).

They were current #s, and there were a couple of plugs at 2 of the stores. They still make them.

 

[dlstewart01]

Gm recommends AC delco 41-985 gaped @ .040. Oreilly's has them here for around 6.50 each.

\see this

http://www.acdelcotechconnect.com/pdf/tsb/tsb_03D-J-171.pdf

 

[PenguinLTZ]

Gm recommends AC delco 41-985 gaped @ .40. Oreilly's has them here for around 6.50 each.

Don, I refuse to gap my plugs at nearly a half inch

 

[dlstewart01]

Gm recommends AC delco 41-985 gaped @ .40. Oreilly's has them here for around 6.50 each.

Don, I refuse to gap my plugs at nearly a half inch

Sorry about that I left out a zero.

did you see the bulletin,

http://www.acdelcotechconnect.com/pdf/tsb/tsb_03D-J-171.pdf