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.
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