Fuel Mileage post L87 recall

[WTJOE]

It's going on 3 weeks since I took my 22 ZR2 in for the L87 recall. My truck passed the Pico test and I got the new 0W-40 oil change (free of course).
Has anyone noticed any reduction in fuel mileage since going to the higher viscosity oil? I've been on 2 300 +/- round trips since
the recall and have averaged 17.5 - 18.1 mpg's. I haven't noticed any degradation in mileage with the new oil. I remember a thread about a class action lawsuit regarding
poorer mileage with the new oil. Just wondering what others are experiencing. I had the fuel injectors and the throttle body treatment/service. It does seem a little peppier.
Maybe that's part of it.

 

[AXE]

It's going on 3 weeks since I took my 22 ZR2 in for the L87 recall. My truck passed the Pico test and I got the new 0W-40 oil change (free of course).
Has anyone noticed any reduction in fuel mileage since going to the higher viscosity oil? I've been on 2 300 +/- round trips since
the recall and have averaged 17.5 - 18.1 mpg's. I haven't noticed any degradation in mileage with the new oil. I remember a thread about a class action lawsuit regarding
poorer mileage with the new oil. Just wondering what others are experiencing. I had the fuel injectors and the throttle body treatment/service. It does seem a little peppier.
Maybe that's part of it.

I don't think there would be an noticeable change in real world conditions with weather and terrain and driving habits in play. These fuel mileage standards are calculated and proven on a dyno. You'd have to have 100% control over the inputs to even do a comparison.

Always good to clean the fuel system. It will certainly optimize fuel consumption and performance.