I have a can of WD40, or rather since last 10 years bottles and bottles of WD40. used to spray everything on myc ar with it, treated it as lubricant. untill recently saw some article said not safe on this la that la. Im tempted to spray on my bushings and suspecnsions. shall be safe???? also on battery terminals and door hinges. where else can I use it

on rusted bolts that u trying to loosen

This post has been edited by kurangak: Jun 11 2016, 07:28 AM

what if I dun have any rusted bolt I wanna loosen haha. I ran out of things to spray and play with on a Saturday morning. Can u imagine. All just because they say WD40 is harmful

Wow, you really addicted to WD40.

Anyways, WD40 is not really a lubricant...

When not to use WD40 (and their reason):-
http://lifehacker.com/5891936/when-should-i-not-use-wd-40

Here are the uses:-
http://wd40.com/img/WD-40_2000_uses.pdf

Don't spray on parts which are exposed to sand. This is because sand will stick on to the oil and ruin the apart you are trying to lubricate.

Use silicone spray instead of normal WD40 spray.

Wd40 is not lubrical.
Its water repelant.

It will also desolve lubrical and grease.
Use it for cleaning and removing water.
After that, apply lubrical..

This post has been edited by chamelion: Jun 11 2016, 02:24 PM

So what are the usages. I think i gonna buy a silicone lub. But what about this wd40. 1 wholr bottle. What else can i use for. Battery terminal right of cars

Use it to protect chrome parts.

chrome as in those plastic chrome can as well?

Metal chrome. I have a chrome bicycle and chrome bumper on an old car. Sort of works. But needs constant application. Better off buying an expensive clear laquer paint. Mask and paint to protect.

I as thinking of using as engine bay dressing as well

After i clean the outside of my car carburetors, i will spray a coat of WD40 on it.

Saw this at the shop just now. Can i use this instead for all lubrication in car. What is it actually


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Wd40 is not a lubricant. Go spare part shop and get those automotive lube

wd40 is not lubricant, it is a PENETRANT.
it is a very light penetrating oil because of high solvent content in order to sip through fine cracks or gaps.
and you will never want any kind of solvent (incl. diesel,petrol, methonal, ethanol, etc) to get intact with your paint or rubber bushing/gasket/o-ring/oil seals. simply bcoz solvents dissolve most paint & polymer.

Do not spray WD40 onto sqeeky parts eg. door hinges. it does eliminate the noise for couple of days, eventually the oil will dry out. what make things worst is the solvent in wd40 will dissolve the grease which was initially in the hinge. So use only lithium spray grease on hinge.

This post has been edited by yamato: Jun 12 2016, 11:31 PM

this is calcium grease which good for lubricating pins, bushs, hinges, coz it has excellent anti water washability but poor lubricity and poor against high temperature.
for bearings u need lithium or lithium-complex soap base grease.
CV joint & ball joint might need grease with moly powder (molybdenum disulfide)
springs in locking mechanism (door handles, rear seat folding&locking) uses only special dry-film-lubricants that do not attract dust and dirt.
too many to list down....in short, different lubricant for different application. u cant use engine oil as gear oil, and u cant use brake fluid as power steering fluid. same principle applies to grease.

Wow there are just too many. Well then what is the best multipurpose lubricant then. I have seen some odd ppl use engine oil for everything instead. They take a drop of engine oil n put on hinges, bearings. Oh no I din know wd40 is that bad? Coz according to they themselves it doesn't harm paint n rubber. What do u use wd40 for then. Is silicone lubricant the safe multipurpose spray instead. I feel like buying this calcium grease coz toyota used to put on hinges years back but nowadays no more not sure why

This is grease, can use for lubrication at your door hinge, door lock.

want a multipurpose grease then get lithium base grease. it can replace and fully compatible with calcium grease.

wd40 is less corrosive coz the solvent evaporates quick enough not leaving an etch mark on paint. but on rubber definately no-no. rubber are made of different materials- NR, EPDM, PU, NSR, NBR, CR, etc. Some solvents (or oil) may not react on certain type of rubber coumpound, but might swell or harden other rubber materials.
One type of oil may give defferent results on different material, refer table below.

From economic standpoint , calcium also good enough right

it is good for moving & sliding parts which expose to weather.
just dont apply it to bearing.

In layman term, calcium grease is also called heavy grease or chassis grease if u r get them in workshop or local hardware shop.

It is safe on rubber or bushes as well right. Coz i have seen ppl putting on bushing

to be safe, no!
silicone grease (or oil) is the right choice to buff your rubber and plastic part, not calcium grease.

Ok bro. Then y not just use silicone on hinges n so on as well

can. make sure the silicone is solvent base and not water base.

how about the keyholes for motorcycle tank...once it got jammed and i just sprayed wd40 in... problem solved...
but..is it advisable?

keyhole must stay dry all time. oil is not appropriate. use only moly or graphite powder.
end user will have problem aquiring industrial grade moly powder, so my advise is to scrape off the carbon tip from the pencil using a pen knife, make sure it is in fine talcum form.

Put the powder into the keyhole and apply thin layer onto the key too.

Note. not too much powder into keyhole u dont wanna fill it.

But in your opinion is it advisable to spray WD-40 into the keyhole? Any disadvantage or is it a good practice?

I also do it from time to time but not sure if it does any lasting damage..

This is the trick that paint shop using

https://www.youtube.com/watch?v=xL2HIuJR43A

simply no.

1. an oily and greasy keyhole attracts dust and particles making it more prone to jamming the key in future.
2. oil in the keyhole will stained your key, u dont want an oily key in your pocket. an oily key also attacts dust which back to point 1.

technically the oil doesnt kill the lock, but the dirt does.

ok..

1. a keyhole by its nature isn't open to natural ventilation thus attracts dust and particles except via the act of inserting the key itself..
WD-40 is more a penetration liquid and hygroscopic removing oil,dust and moisture and evaporating leaving a non oily residue (from what i understand)

2. Thus the buildup of oil due to WD-40 becomes a non-issue, with it the attraction of dust and other sticky contaminants..

If the above is true then the only issue would be the removal of the natural lubrication oil within the keyhole itself that is a worry..

Appreciate your further thoughts..

What about using silicone spray for general car lubrication of joints n so on