You want the cat HOT! You could also up the oil to 20/50. Castrol has that new GTX High Mileage which is not supposed to burn.
Put in a single bottle of Chevron's TECHROLINE; you can get it at Autozone. Make sure you get the right size bottle for the size of your gas tank. Run the full tank almost EMPTY before refilling with Chevron's Supreme (92). This makes sure you don't delete the chemicals working to clean your system! When the first tank is gone, put as much 92 in to take the test.....no need to spend the extra money on gas if Arco makes you happy. I'd suggest a full tank of Chevron when you put in the TECHROLINE! Its like a double shot from Starbucks since ALL Chevron gasolines have Techron in it already! (Techron is the additive, they call it TECHROLINE when they sell it on the shelves.)
Arco sucks! That pinging sound you hear is because of the gas! Time after time, most engine related problems are due to bad gas.
Before I went into the Navy, I was a heavy diesel mechanic. The company I worked for was hired to do in-frames on a new fleet for Arco. This new fleet had brand new Detroit 6V-92 engines. There was a massive recall on these engines due to faulty main bearings supplied to Detroit by the bearing manufacturer. I spent over 2 months in Arco's yard here in Southern CA (Bell, CA) spinning out main bearings and replacing them with new parts. Since the engines were already opened, Arco decided to have the rod bearings replaced and the heads reworked. We were able to do 2 in-frames a day by the time we left!
Every day I'd see some crappy looking tanker come in to fill up with gas. I finally asked someone about these trucks and he said they were independents delivering to the Circle Ks, 7-11s, and other low quality, budget gas stations. I asked if it was the same gas as Arco. He said yes, but pointed out the extra line that went into the Arco trucks. He said it was an additive that got mixed in during transit.
Arco is famous for having water in their fuel. I'm sure this is more about the quality of the station's tanks than what comes from the depot, and will agree that the old leaky tanks have been upgraded in the past 10 years. Still, Arcos reputation continues.
When ever someone says they are having a hard time passing smog or if their engine pings, I ask them what gas they are running and 95% of the time its ARCO!
What is interesting is that the BIG 3 in Detroit use Chevron Gasoline during the certification process of their engines! What is more amazing is that Chevron Gasoline is NOT available in Detroit and they have to have it trucked in from out of state!!!
http://www.chevron.com/products/prodserv/fuels/techrongas/successbig3.shtml
I do NOT work for Chevron, own any stock, or have ANYTHING to do with their companies! I am a loyal customer who KNOWS the difference between good gas and bad gas. I ONLY use Chevron gasolines in all my vehicles!
We can get into a whole discussion on WHY Penzoil is bad for your car also!!!
Chevron Gasolines; Castrol Engine Oils (GAS); Chevron's DELO-400 Engine Oil (Diesel).....you can't go wrong! I do run Mobile 1 in my work truck and Safari Van. The wife's car gets Castrol GTX!
(Shell oils have a loyal following and Quaker State makes a good oil too.)
How did we get here anyway?
