finally found the 5w-20 TSB...

[Hershey]

how about PENNZOIL 5w-30 Utra or EURO synthetic ( ACEA A3/B3/B4 ) in a 5w-30 for the YARIS ? Here's the Technical Data Sheet for the EURO Ultra http://www.pennzoil.com/assets/PZL_U...5W30_01_10.pdf and for the ULTRA ( North America ) , http://www.pennzoil.com/assets/PENNZ...thetic_PDS.pdf . Here's full page for the ULTRA , www.pennzoil.com/#/motor-oil/pennzoil-ultra .

[sbergman27]

Originally Posted by Hershey

how about PENNZOIL 5w-30 Utra or EURO synthetic...

The Euro product looks pretty impressive. Particularly for a 5w30. I didn't know a 5w30 with a 3.68 HTHS existed.

The concern by European high performance manufacturers is with the relatively low HTHS of gf-4 oils with regards to the valve train. Specifically, cam and lifter wear. They feel that 3.5 is required for best protection. Unfortunately, HTHS is also the primary number that determines an oil's fuel efficiency characteristics. And lower is better there.

However, the whole issue of valve train wear and HTHS is probably not germane to our cars. Certainly, my 1988 Chevy Sprint Metro 1.0L 3-cyl with 345,000 miles on the odometer still shows minimal cam wear. And it has always used 0w30 or 5w30 Mobil 1, with HTHS of between 2.99 and 3.1.