Its not just "abit steep" , its downright slaughtering at its best.
If any case - this should be reported to KPDNHEP for excessive overcharging. i think the "Persatuan Bengkel" something like that, has a set guidelines of how much should a customer be charged for workmanship fees.

Its not an excuse for "Need to survive " or peace of mind . Consumers should be allowed to bring own parts at their will - and not forced by workshop owners at their will.
This oil change thing is pretty easy actually. One can actually even DIY himself with the right tools.

I've just changed my oil for RM 20 like a month ago, brought my own oil and oil filter even.

Here is a few workshops that charged reasonably for oil changes:

1) FDY Garage - 12, Jalan USJ 1/6c, Taman Subang Permai, 47600 Subang Jaya, Selangor
Owner is a Malay and he is very friendly indeed. Recommended

2) Kian Hoe Tyre & Battery Services Sdn Bhd USJ  - 1, Jalan USJ 19/4, (Behind USJ 19 Mall) - Last oil change I did was around RM 17 if I recall last year, may have gone up in price, but allows bringing own parts.

3) Initial Ng Auto Car Repairs- 6, Jalan USJ 7/3a (behind Dewan Serbaguna MBSJ USJ 7) - From what I heard from my uncle , he says its around RM 25 for oil change if bring own. I have no experience with him.

Hope the above info helps for you in future. And before allowing them to do the job: "Ask first" for the price. It doesnt hurt to ask. Thats what I do when I meet a random workshop before beginning of a job. Too expensive? I say "Thank you" , get into my car and drive off.