As I promised in another thread, I sent in a virgin sample of Pennzoil's 0w40 Ultra that is recommended for Chrysler SRT vehicles.
I'm sure its great for the modern roller-cammed SRT engines, but no way is this going in my vintage vehicles with only 600 and change PPM of phosphorous. I'll do a UOA at the end of a change interval and see if it shows the great viscosity stability that the other PU grades show.
Yes, I know that VOAs are somewhat akin to bench-racing and that only the results in use matter. That said, I'm still a little disappointed- they didn't take advantage of the fact that a 40-grade can have higher zinc and phosphorous numbers than lighter grades the way Mobil does for their 0w40. I guess it really is just narrowly targeted at the SRT vehicles, and its not going to give M1 0w40 a run for the BITOG 'if you had to have only 1 oil on your desert island...' award. I'll probably switch the SRT-8 over to M1 0w40 for commonality with the vintage cars. And besides, this stuff was practically a dealer-only item! ordered a case online and picked up the additional quart needed for the change (7 quarts with filter) at the Dodge dealer, at over $10/quart both places. M1 0w40 is finally showing up in large volumes everywhere and is typically $8/quart regular price and I've gotten it as low as $6/quart on sale.
I'm sure its great for the modern roller-cammed SRT engines, but no way is this going in my vintage vehicles with only 600 and change PPM of phosphorous. I'll do a UOA at the end of a change interval and see if it shows the great viscosity stability that the other PU grades show.
Yes, I know that VOAs are somewhat akin to bench-racing and that only the results in use matter. That said, I'm still a little disappointed- they didn't take advantage of the fact that a 40-grade can have higher zinc and phosphorous numbers than lighter grades the way Mobil does for their 0w40. I guess it really is just narrowly targeted at the SRT vehicles, and its not going to give M1 0w40 a run for the BITOG 'if you had to have only 1 oil on your desert island...' award. I'll probably switch the SRT-8 over to M1 0w40 for commonality with the vintage cars. And besides, this stuff was practically a dealer-only item! ordered a case online and picked up the additional quart needed for the change (7 quarts with filter) at the Dodge dealer, at over $10/quart both places. M1 0w40 is finally showing up in large volumes everywhere and is typically $8/quart regular price and I've gotten it as low as $6/quart on sale.