Does your jizz ever ruin your cats?

I remember hearing rumors that the goodies in T6 accelerate catalytic converter wear but some more recent posts on BITOG.com say otherwise.

 

ZDDP is supposed to affect the newer 3-way catalytic converters which is why EPA mandated removal of those additives. Obviously, they don't affect older design catalytic converters (as installed since 1975) nearly as much since we've been driving those cats with the older oils for decades. I'm not sure what model years started using the 3-ways. My '09 G8 had a 3 way before I put on the high-flow cats. I don't think any NAs ever had them. Some later NBs might. NCs almost certainly do.

 

If it were me personally I would use royal purple HPS 10w30

 

According to my research, 3-Ways have been used in US since 1981. I know that my 1999 used the tic-toc of AFR between 14.2 to 15.2 which is used for 3-Ways. The major difference between OBD1 and OBD2 is the efficiency of the converters. Both should be 3-Way.

Seems that the OBD1 style should be OK with the T6, which has around 1100ppm phosphorus.

From Scorpion:
"Caution: For good catalytic converter life, vehicles produced from 1992 through 1996 (API SH) can use oil with phosphorus levels of 1200 ppm maximum. Vehicles produced from 1997 through 2003 (API SJ and SL) can use oil with phosphorus levels of 1000 ppm maximum.† Vehicles produced from 2004 and newer (API SM) are limited to 800 ppm phosphorus"

 

For once, Canadians get something that is not in the US yet: Rotella T6 in a 0W-40 with an API-SN rating. I saw it recently in a Canadian Tire store and it looks like I may be making the switch as soon as the cars (a 2001 Miata and a 2009 Legacy wagon) finish digesting the two fresh jugs of Pennzoil Platinum 5W-30 in my garage.

I used to run Mobil 1 5W-30 in the Miata but it seemed to be a little too thin for its taste and Mobil 1 is near the low viscosity limit for the oil. If you want a good assay of many new oils, this chart:

March 2013 - Test Results for AP

gives you the reality that replaces the hype we are all subjected to.

 

FWIW, T6 has SM on the label.

 

Ice Road Truckers FTW!!

 

I use T6 5/40 and have no oil pressure issues. We've started using rotella (conventional) in our dirt bikes and it's going in the f150 next oil change.

It's the quality of the super expensive oils, at a much better price point.

 

A new store opened up near us at the Dixie Value Mall in Mississauga that was selling Pennzoil Platinum for a discount of 40% under the $28.88 jug price. This store was the old Sears clearance outlet. That would be $17.33 plus tax. The Miata loves the stuff (but it hated Mobil 1). The name of the store is Treasure Hunt. It just might live up to its name. My car hated Mobil 1 but loves Pennzoil Platinum.

 

That's nice.

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