Just came in. Looks like the bragging that Chevron did saying its conventional 15w-40 with "ISO-Syn" would equal or outperform the competition's "synthetic blend" offering (Delvac 1300?) held up. I got some Delo Synthetic 15w-40 at "clearance" price at WM and have it in the Scion now. Gonna take this fill to 17.5 to 20K OCI. My new job has me driving about 500 miles less per month, so my next UOA will be about a year away. However, my wife is putting about 2 to 2.5K a month on her Mazda so I am doing extended OCI's on her vehicle as well.
2010 Scion XD, 153K, 14.2K OCI Delo 15w-40
- Thread starter Stumpy
- Start date
Does the engine feel sluggish at all with the 15W40?
You had a pretty significant decrease in your flashpoints starting during your 124k UOA. 375F is pretty low IMO to be extending. Run two bottles of Redline SI-1 during this OCI and see if flashpoint improves.
With a TBN of 1.7 on a 14.3K run AND your driving mileage dropping by 500 miles per month? I wish you the best of luck.
Last edited:
Nope. Revs like a scalded dog.
Conventional. Not Syn Blend or Synthetic.
I'm sticking with what I got. Ain't gonna buy Redline unless I still drove 2.5K a month and wanted to do a 25K OCI.
Umm.. the Redline I suggested is a fuel injector cleaner. Since you have a PFI engine, low flashpoint is indicative of a fuel injector issue or piston ring issues. SI-1 is a powerful injector cleaner and will help make sure there’s a good pattern and sealing well.
Roger that. I'm not up on Redline products anymore and had forgotten their Fuel Injector Cleaner designation. I changed the plugs when I got it. The engine runs great. No smell of fuel upon start up or anything. I'll find some and try it. Or I make get some BG 44K Injector Cleaner. I know lots of ASE certified that swear by that stuff.
Darn good report sir. Thank You
