Granville 1440A 10K 375ml Boost Stop-Leak Power Steering Fluid

Don't listen to the negative reviews, if used correctly this stuffs brilliant. So firstly,if you have a massive leak or a split hose this stuff won't work, it's not a miracle in a can ! Its not a substitute for replacing knackered and completely worn out parts. However, if you have a drip drip type leak then this could do the job but....I suspect a lot of ppl have been tipping the entire can in to their systems then becoming dumbfounded that the leaks got worse! This stuff is water thing and contains a solvent that revitalises seals , a little drop will do you! Start with just under a quarter of the can make sure the fluid is on the stick. Start car and rotate steering a dozen times, then take for a 15 mins drive , make sure there are some corners and junctions, park car , check for leaks the next day , add a touch more if required

I’ve got a slight leak on power steering that makes it a bit stiff when 1st starting car. After about 5 min it usually free up and normal. I’ve tried several leak stop etc and no good. Tried this and after about 1 week of driving its loads better on steering when 1st starting car

It worked for me , previously the ground would get damp with oil after a drive and other bits below power steering hose. Now all bone dry , I highly recommend using a syringe to suck up oil and then putting whole can down there afterwards. Hopefully this will be a long term fix and not just a temporary fix . Edit: 2 months on and still not leaking , brilliant. Edit: over 6 months now and still not leaking

We own a 2005 Nissan Murano, the parts are no longer supported by Nissan so rather than pay £500 for some replacement parts from Europe I thought I'd give this a try. It did work for a couple of weeks but maybe the leak is too large and the screeching is back and the steering stiff once more. Not a big deal as we have bought an electric Mercedes now as the Nissan was close to becoming ULEZ non-compliant. Anyone outside the London area want to buy a nice Murano? Just had new radiator, brakes, exhaust, fan belts but may need a power steering hose!

Previously used similar items to try and cure my power steering leak to no avail. I was loosing roughly half a bottle a month. And was to cheap to take it to a garage lol. Purchased this down to the good reviews and I’m happy I did. I changed the power steering fluid with fresh stuff and added this product. Over a few weeks I did loose some fluid however noticeably less then previously. After 3 weeks or so I topped the fluid back up to the mark and since I haven’t lost a single drop of fluid . Great product and done what a lot of other products couldn’t .

Rubbish made it worse

I was doubtful but in view of the problem and cost of dismantling the car it was worth a try. In a couple of weeks it stopped fluid leaks and the car drives fine. (1998 Volvo 940)

Seemed to make the leak worse and the whole can basically went straight through the system. Topped up after with regular ATF and the leak slowed right down to how it was before. Stumped.