https://www.3inone.com/products/multi-purpose-oil/
3 in 1 oil sounds good. Locally got sell ard 7 or 8 bucks.

Used cooking oil with any solids filtered out

Edit to add : Link to the full article

Got..i bought also
https://s.lazada.com.my/s.WggWs

Ideally before and after use can put a few drops, for lube n rust prevention. I use it to keep my hand tools eg bahco spanners & knipex pliers lubed up to prevent rust.

Dry lubricate. It looks almost like singer oil viscosity.
Motor or bicycle shop should have.

Dont use wet lubricate, sawdust will stick to wet lubricate.
Wet lubricate viscosity look like car's lubricate.

Cooking oil will turn rancid after a while.
WD40 is not a lubricate; it is a water dispenser (water remover).

Can use cooking oil. Can read anywhere.

https://thesprucetools.com/what-can-i-use-f...ainsaw-bar-oil/

Ya on the chain part..sprocket.
Its actually SAE 20 mineral oil la for the 3in1 bottle.

Chain tank if ur chainsaw use SAE20 (motor oil spec) then can use that..the tank one see what the chainsaw require

any oil also can. it is just to lubricate the chain to prevent it from seizing. we always used spent engine oil

That depends on few factors
1. Are you in west or soviet states of MY?
2. Must be Hikoki or open to other brands?
3. Intended use case, everyday use workhorse or its DIY/hobby occasional use only?

So (1) no issue even if u order online

(2)

price wise can probably mix and match bosch to get more tools
bosch is pretty cheap coz of preferential duty I think; and batteries are cheaper than makita
-- sometimes assembling your own kit is better out of solo tools and piecemeal from diff sellers according to pricing, so you can customise what you need if you're not urgent to use it
-- last time I did that and I got a rotary hammer (brushless GBH180LI)+fast charger+4AH procore for 777 (old pricing)
-- add drill driver around 220 (GSB180LI plastic chuck); or GSB18V-50 metal chuck around 320
-- add impact wrench (can open truck 21mm nuts easily) GDS18V-400 around 400 when I got it, now solo tool about 445 on shopee
-- add another battery procore 4AH, now 310
=1900

I have a concern on the 1.3J of the rotary hammer.
Its a bit weak if you do heavy drilling and korek lobang (chasing), but it may be the right amount for those 5.5mm/6mm wall plugs without creating craters in plaster.

(3)
May not need impact driver (the hex bit screwdriver) if you're not regularly driving lag screws into hardwood timber;
since the kit already come with impact driver
meaning to say a drill driver + rotary hammer would probably suffice for all home use.

you don't need to buy everything at once

if u mahu start with 18V collection, avoid BOSCH - they are BORING

start with MAKITA or MILWAUKEE

soooo many 18V toys to play with

sincerely, owner with stuck BOSCH 18V system. i have like 5 power drills, 2 impact wrench, 3 hammer drills, 2 grinders, 1 multi tool and basically u have bought ALL of BOSCH punya 18V tools... haihs... really boring

china those all fake v sia
repeating same issue. GSB120 spec at best.

It depends what u want to do..
General use drilling walls GBH 180LI rotohammer should be perfect. Lightweight and no need to struggle with cord not long enough etc.
Keep your GSB120 as screwdriver.

Else if driving screws directly into solid balau go for impact driver.

cabinet screw normal one right? not self drill screw? that cement board (papan cantik) if use normal screw mmg hard to go in.

Since you have bosch gsb, then can get gdr12. Uses same battery system. For wood or fiber cement, can drill small pilot hole before screw in. Having both drill and driver makes easy change. And going up for roofwork, need to use cordless lah.

From the look of the picture, looks like rain water will flow pass the gutter 😂

More like predrilling needed.. depends on what you're screwing into?
18V should work but idk bout this DCA coz no published Nm spec 

To be honest if you're not using the other stuff often (at home) like cordless grinder it's like pushing you to buy stuff you don't need
My reco is usually just go 18V Bosch, one nice drill driver (GSB 18V-50 for continuous duty hours on end or GSB180LI if just light duty) n one cordless rotohammer (GBH180LI).

Because the rotohammer cordless isn't that expensive
You just need investment in one 18V batt (say 4AH) and any 18V charger.

Its kinda niche thing because hex bits usually only used for socket bits IIRC
We been running round shank bits since forever (for metal/wood) and concrete wall already using SDS+
Hardly have use case for hex bits unless you are using with the home use-end cordless screwdriver