Originally Posted by manfurismojive
Not sure if this is reviving an old thread, but felt it was relevant sooo...
I use Pennzoil Ultra Plat on my 2009 Mazda3, and recently got a CX-5 Signature and after reading the responses here, figure it should be good as it pretty much its on most of the requirements for a good oil for turbo (5w-30 as recommended in the manual, Full synthetic, GF-5, dexos even the Honda HTO-6 spec, which judging from a previous comment might not matter as much anymore). Curious about two of the specs they listed in their product page though (
https://www.pennzoil.com/en_us/products/full-synthetic-motor-oils/pennzoil-ultra-platinum.html).
In it, the API spec says it meets SN, SM, SL and SJ. Does this include the SN+ spec as well? Also for the GM dexos1 spec, it does not indicate whether it is gen2 or not. I assume a modern full synthetic which is top of the line for a brand would meet top of the line spec requirements as well, but just wanted to make sure.
The other choice would be the Mobil1 full synthetic, which is clear in meeting all of the above mentioned spec and is also easily available at Costco (and would be one of the only reasons for going with Mobil1). For the most part I've been going with the Pennzoil Ultra Plat when they have rebates which are good up to a limit of like 4 units of 5qt bottles or something like that.
Can't go wrong with the Ultra. Any of the major brands that meet the specs for your Mazda will run fine. Sounds like M1 will be easier for you to get. Another fine choice.