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Rats ... experienced the 5w-20 jinx again today. First when I really wanted to try PP I couldn't find it in 5w-20 ... today I go to Wally World to get GTX "anti sludge" and they have the new formula in everything but 5w-20.

Trying to see if my current generation was designed with 5w-20 in mind or was it caught up in the "administrative decision" to use 5w-20. (read in between the line) I'm trying to justify switching to 5w-30 in New Orleans summers and traffic jams.

and many post state that they've accomplished this kind of mileage with "minimal" oil changes, e.g. Super Tech dino and Fram filters, or QS and ST filters @4-5k OCI's?

I don't believe anyone is going to be a sucker ... it was pretty good oil before the reformulation.

Why worry about Syntec when GTX has the magic?

As of right now I fully intend to switch to GTX. If Mannix posted misinformation, I'll still be using oil that exceeded Ford's 930a standard. If Mannix is correct it'll just be the cherry on the cake.

Thanks Bio-T

Why was Mannix's post removed?

Or is it just a marketing ploy?

Would it be a bad idea to run PP 5w-30 when the manual calls for 5w-20?

I was planning on purchasing the hatchback but couldn't wait after my Corolla got totaled. From what I read ... they're not getting the real world mpg that the ECHO did.

Because they arent' worried about 0.1 mpg CAFE standards?

I'm leaning towards Havoline next time with a Motorcraft filter.

Don't believe Vavoline synpower comes in 5w-20.

hominid7, That was a great answer. I was way off when I thought I was Havoline (better additive pkg) against MC (better base group).

Thanks Al. With 8167 post I think your opinion is valid. I drive fairly hard, e.g. 95% city mileage, but only drive 5-6 k miles a year, so I'm leaning towards 6 mo OCI's.

Someone's got to have an opinion on which is better. They're very different aren't they?

Which would you chose? Better additive pack vs. higher base group

What about automatic transmissions? I heard you have to let the vehicle warm up while it was in drive to circulate transmission fluid.

It doesn't seem realistic that a major co. like Pennzoil wouldn't go through the testing sequence. Why would they intentionally exclude themselves from the market of all Chrysler products?