Owner reviews for engine oil

Did switched my D400 to Motul 7100 4T 10W-50 @ 8K kms but in a non Bajaj service center.

Difference that I notice:

Engine looks a bit refined and smoother at high speeds or cruising above 70.

I switched to Valvoline last oil changed and really like it. Feels more lively than when I changed it in the past (typically use dealer recommended Castro).

I bought the best 10w40 full synth ester available on my market (best lubrication according to tests among hundreds of oils) - Eurol Sportbike 4t 10w40, and will change it next week to see if the shifting sound and smoothness improves vs. motul 5100 10w30 that I currently am using.

I used Mobil 1 with my Mustang. I like it for my timing chain and valve line. It’s very good. Car runs quiet.

On my newer engines that are modified I use motul, older high performance flat tappet engine I use rotella or equivalent. On my daily commuter I use castrol.

I'm a Castrol syntec guy and I like Kirkland oil. So that's what my cars get.

Good old fashioned Mobil 1 for me. It wasn’t available during the pandemic so I used Valvoline Synthetic for a couple of years.

Better than other 5w30 engine oils that I have used. Do not need to add oil between oil changes. Super smooth.

I'm personally running Castrol in the BMW bottle.

I do have slight oil loss but I also track my car several times a year so it's to be expected. Recently switched to 5w-40 motul so we'll see how that does.