Hello Dear,

Each run was replicated three times for every sample to assure result accuracy and reliability.

Each sample was examined for three times with same testing parameters and the results mentioned in the below manusctript is the mean of these three experiments.

https://www.researchgate.net/publication/330815643_Enhancing_the_Tribological_Behavior_of_Lubricating_Oil_by_Adding_TiO_2_Graphene_and_TiO_2_Graphene_Nanoparticles

Don't hesitate to ask me any further question.

Regards,

Yes indeed, I recommend to run three replicas of each set. You can verify reliability and accuracy. Also determine the std. deviation in your results.

There are two way that you can consider performing experiments.

1. The test were performed based on the standard ASTM D 4172. In the standard it clearly states that the load variations should be +/- 0.2 kg that means +/-1.92 N variation to consider test to be admissible and results to be reliable. Hence, the variation in 17 n is definitely a significant variation. This is condition is considering the variation in load during the testing.

2. If you are planning to design your experiments such that variation in the load is considered one of the parameters then you have freedom to do so.

Hence, if your question is based on 1 or 2, you have the answer for that.

Hope this helps

Thank you