Ah, yet another oil war. brace yourself. Syn or dino, your choice. Use the correct weight and be sure it meets the GM Dexos specs. Pennzoil wants you to buy the more expensive produce so of course they don't suggest mixing.

 

Pennzoil's comparison shows only difference is Ultra is for "Extreme Performance". But the jugs themselves show SN+ for Platinum but SN for Ultra. SN+ is better for LSPI. I use Ultra in some cars but Platinum for my ATS because of the turbo and LSPI.

As for availability, Walmart has for free store pickup. Currently $19.xx for 5 quart jug. Or free delivery for orders above a certain dollar amount ($35?). Amazon also sells it.

 

Pennzoil's comparison shows only difference is Ultra is for "Extreme Performance". But the jugs themselves show SN+ for Platinum but SN for Ultra. SN+ is better for LSPI. I use Ultra in some cars but Platinum for my ATS because of the turbo and LSPI.

Just out of curiosity, if you had an '06 CTS with a 3.6 V-6, which oil would you be using the Platinum or the Ultra?

Thanks

 

Appreciate the replies. That's the 2nd time today that I have noticed in some quick research work that the Platinum has an extra benefit over the Ultra.

Looks like I'll be switching to the regular Platinum next oil change but will avoid the mixing the two in the meantime.

I would just as soon use the old dinosaur oil, but was told that once a car has Synthetic, stay with Synthetic.

 

I would just as soon use the old dinosaur oil, but was told that once a car has Synthetic, stay with Synthetic.

You can switch back to dino oil with no problems. You are NOT stuck with synthetic.

 

Mix the Ultra 7 Platinum if you want. No problems. I have run the Platinum 5W-30 since I bought the car in 2005. Before that it ran on Miobil 1.

I work part-time at the parts counter of my local Western (Tire &) Auto, and we sell tons of Platinum. One of our most popular engine oils.

You can also run good ol' Pennzoil dino oil. No problems. I would recommend the Platinum, though - based on experience over more than 15 years with 4 cars and 5 light trucks.

I happen to like WIX oi filters.

(Based on this forum and service bay hearsay I would not own a Cadillac 3.6 car)

 

Thanks, I'm also a Wix Filters fan.

Just curious though on your opinion of the 3.6? Or what anyone else is saying. Although I'm an old 4.9 DeVille owner and new to the CTS crowd, I haven't dug too deeply into it, but what I did find was pretty positive so far.

 

The 3.6 is a good mill.
Don't let hearsay get in your head.

 

...”There is NO oil that someone somewhere would put in an '06 CTS (or any other car). But I would use ultra (usually referred to as PUP for short).”

huh?

 

Left out a "not". Fixed.

Thanks.

 

Appreciate the info, but besides the thinking that it is better, I'm curious to what the extra benefits you feel Ultra would have over the regular Platinum? Just trying to help weigh out my options, lol. Especially in the 3.6 that I have.

Thanks

 

Appreciate the info, but besides the thinking that it is better, I'm curious to what the extra benefits you feel Ultra would have over the regular Platinum? Just trying to help weigh out my options, lol. Especially in the 3.6 that I have.

Thanks

Why do I use PUP? I can never rule out unexpectedly needing extreme performance in my high performance vehicles.

Both PUP and Platinum are made from natural gas so they are part of my personal green new deal. Dino oil lays harmlessly underground where its carbon is no threat. But natural gas could leak into the atmosphere. The only way I can do my part is to buy oil that is made out of it. I usually buy way more than I need and just recycle it unused.

But seriously, if you have decided on Pennzoil synthetic, get whichever is cheaper for your car. For how it sounds like you drive, I would buy whatever brand of synthetic meets the spec in your owners manual which is more than just the weight. If you didn't get a manual with it, they are available on-line.

 

After using the ultra, my pan did develop a leak I suspect because it cleans so well, and my seals are old - '04, but after going to Pennzoil high mileage, no more leak. No problem mixing...why they would have said no mixing makes no sense to me. Also no issues switching from dino and back and forth (that's an old tale that has no solid foundation). When I needed to add oil and only had dino, I used it, and no issues I know of.

From Canadian Tire site.

Pennzoil Platinum

• Pennzoil Platinum Synthetic Engine Oil is fortified with Active Cleansing Agents™ to continuously prevent dirt and contaminants from turning into performance-robbing deposits which helps maximize engine cleanliness and responsiveness
• Keeps your engine up to 40% cleaner than the toughest industry standards
• Removes engine sludge better than conventional and synthetic blend oils
• Exceeds the most stringent car manufacturer requirements for cleanliness and protection (based on GF-5, Ford, Chrysler and GM specifications)

Pennzoil Ultra Platinum

• Pennzoil Ultra Platinum Synthetic Engine Oil with PurePlus Technology delivers complete protection
• Keeps pistons up to 65% cleaner than the toughest industry standards
• Provides better fuel economy
• Horsepower protection helps protect engines from loss of power
• Provides better protection from friction
• Excellent performance in extreme temperatures provide faster low temperature oil flow and protects in extreme heat

Pennzoil High Mileage

• When vehicles reach 75,000 miles, it’s time to make the switch to Pennzoil Platinum Synthetic High Mileage Motor Oil with PurePlus Technology for complete engine protection
• Conditions seals on older engines: Less oil burn off, and specifically formulated to reduce leaks and oil consumption in older vehicles
• Redesigned to protect modern turbocharged engines; API SN PLUS ready
• Excellent protection in extreme temperatures provides faster low temperature oil flow and protection in extreme heat