Not sure even with you stating experience (with what Dynos? ) how you can make that first part of your comment??? Every time to turn on the Dyno program it needs manual information set up input.
It is not a calibration but how the DYNO operator sets up the computer program for the run and also how the shop is set up.
It is very easy and often done by shops that have Chassis Dyno's to set up the program to more influence their customers wishful thinking about what their ride actually produces for power.
No one said anything about legalities having to do with a independent Dyno testing. In fact some states have restrictions on their use.
Example : California has restrictions for shops doing dyno testing on vehicles. Starting July 19, 2021

I also posted many times having personally owned and operated 3 different types of DYNO, Chassis, portable and engine Dyno. I like to think based on a few years performing them I may know a little what I am talking about?

 

I'm not talking setup info but anual calibration check to ensure they are displaying accurate information. I know of 4 maninline dyno's that have been in service for a long time and not one had had a recalibration done. This being the case thay probably will all display different readings.

 

Honestly you can't say that unless your ask the shops that own them. Depending on the Dyno manufacture most all suggest that a calibration be done at least once a year. Without that the Dyno register can start to decline at an accumulative rate and making results very inaccurate.
I know you are trying to back pedal on your responses but maybe post more info about your inferring and meaning of services and just information.
Dyno calibrating to keep the results accurate have been done since the early Dyno days at least that I know of from the mid 1970's
One thing, a good Dyno operating can set the Deltas place the information save to file or document depending on the programing used and with that file information recreate by adjusting the calibration settings in the Dyno programing and achieve the same testing values from the baseline to repeat and have almost the exact same results weeks later or more on the vehcle tested. But the Dyno needs to be in good shape and service by way of calibrating it frequently or at least annually.

 

Honestly you can't say that unless your ask the shops that own them
Yes I can because I worked at all four locations and anually they got all the instruments checked and if necessary recalibrated and I did ask abt the Dyno and they said they had never done one.

 

Ok

 

Yes - I just posted this so the myth about 87 gets examined - and your average owner is better educated on what is the optomal fuel choice for thier needs - and reliability - I think that modifications are another subject - but interesting - Yet mods change the whole thing - Im solid on these OE engines reliability and performance being best with premium - simple stuff

 

and this is absolutely correct ^^^^^^

This is a debate on many forums yet only in the real world some of us know better about auto manufacturers power listing fudery and real world results and testing

 

Average cost difference is .50 per gallon between 87 & 93.
Obviously, we are mostly vehicle enthusiasts on here.

But for many average drivers cost, not performance, is the single most important reason for them to purchase the octane they do.

 

+1...and i currently don't own anything that needs premium

 

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