My neighbour's got a '99 BMW 540i, and has problems with his valve seals. It's a real pain to replace them on this engine, so we decided to go with Fuchs Titan SuperSyn SL 5W-50 and a 300 ml can of Liqui-Moly Motor Oil Saver (called Oil Leak Stop in some markets).
After adding it, oil consumption heavily increased. It used to lose about a litre every 3,000 kilometres and suddenly it was a litre every 1,000 kilometres. He's been using the same oil for the past year, so we figured its the additive. Roughly 6,000 kilometres later, it went back to a litre every 3,000-3,500 kilometres and the engine started running smoother.
Had a word with him today, as he took the car in for an oil change. The tech called him out, and asked how long the current fill was in service. It was only in for 10,000 kilometres, but the tech didn't beleive it, claiming it must have been in service for 'years'. Apparently, the oil filter was covered in sludge. He changed the oil and filter, added another bottle of Motor Oil Saver and drove out.
After the oil change, the engine started running much quieter and smoother and there's definitely been a reduction in the amount of exhaust smoke. Too early to comment on consumption though. Seems this is an excellent product, although it's a LOT thicker than anything like STP, etc. What I found interesting was the oil filter though. Seems it also works to clean the engine, whilst rejuvenating seals. Anybody here used this before?
After adding it, oil consumption heavily increased. It used to lose about a litre every 3,000 kilometres and suddenly it was a litre every 1,000 kilometres. He's been using the same oil for the past year, so we figured its the additive. Roughly 6,000 kilometres later, it went back to a litre every 3,000-3,500 kilometres and the engine started running smoother.
Had a word with him today, as he took the car in for an oil change. The tech called him out, and asked how long the current fill was in service. It was only in for 10,000 kilometres, but the tech didn't beleive it, claiming it must have been in service for 'years'. Apparently, the oil filter was covered in sludge. He changed the oil and filter, added another bottle of Motor Oil Saver and drove out.
After the oil change, the engine started running much quieter and smoother and there's definitely been a reduction in the amount of exhaust smoke. Too early to comment on consumption though. Seems this is an excellent product, although it's a LOT thicker than anything like STP, etc. What I found interesting was the oil filter though. Seems it also works to clean the engine, whilst rejuvenating seals. Anybody here used this before?