Engine become noisy after changing to 5w-40 engine oil

• K_ge_zi_wang

  3 Jul 05, 03:48

  hi, my 13 year old gti's engine become more noisy after changing to fully synthetic engine oil.....any ways to rectify this? any the fuel consumption is ridiculous....300+km for close to 30 litres of petrol....
• seow

  3 Jul 05, 13:01

  removed
• Troy437

  3 Jul 05, 16:51

  Maybe your car cannot use fully synthetic 5W-40 engine oil?
  
  I changed to one brand called car-lube Triple R 5W-40 fully synthetic oil (UK brand) bought from Carrfour. Quite ok leh. Cheap lah only $39.90. Usual fully synthetic from Castrol, Shell or Mobil all cost abt $70 plus minimum.
• kyne

  3 Jul 05, 20:21

  For old cars, it is recommended that you stick to mineral oils.
• K_ge_zi_wang

  4 Jul 05, 00:04

  do engine oil come in 10w-40? of its just 5w-40 or 20w-40 usually?
• tailslide

  4 Jul 05, 01:07

  Originally posted by K_ge_zi_wang:

  hi, my 13 year old gti's engine become more noisy after changing to fully synthetic engine oil.....any ways to rectify this? any the fuel consumption is ridiculous....300+km for close to 30 litres of petrol....

  change back 2 ur previous engine oil?
  
  or do the expensive way. overhaul ur engine. not only can use synthetic oil after dat, ur engine response and fuel efficiency will also improve.
• K_ge_zi_wang

  4 Jul 05, 23:16

  Originally posted by tailslide:

  change back 2 ur previous engine oil?
  
  or do the expensive way. overhaul ur engine. not only can use synthetic oil after dat, ur engine response and fuel efficiency will also improve.

  what does the overhaul process consisted of?
• tailslide

  5 Jul 05, 00:00

  Originally posted by K_ge_zi_wang:

  what does the overhaul process consisted of?

  they will take out ur engine, dismentle it into teeny weeny little bits, change new piston rings, gaskets, replace worn valves, machine ur cylinder walls and cylinder heads to ensure proper seal, change timing belt, change water pump, clean up sludge deposits, blah blah blah blah....... well in short, u basically get an engine that's operating almost like it was brand new.
• K_ge_zi_wang

  5 Jul 05, 00:47

  any workshop that is good in engine overhaul? can recommend me some?
• LittleTiger

  6 Jul 05, 12:58

  If their workmanship is no good, ur engine might have the change to spoilt.
  
  Fully Synthetic oil is too thin to cover the gap between gaskets and o-ring on old engine. Use at least 10 or 15 oil which is not too thin.
• endless373

  6 Jul 05, 16:58

  Originally posted by LittleTiger:

  If their workmanship is no good, ur engine might have the change to spoilt.
  
  Fully Synthetic oil is too thin to cover the gap between gaskets and o-ring on old engine. Use at least 10 or 15 oil which is not too thin.

  I doubt there is any diff in using 5W40 or 10w40 or 15w40 engine oil.
  the first figure (?w40) does not apply in sg context...
  
  Maybe for old engine, shld use ?w50 engine oil instead ?
• tailslide

  6 Jul 05, 17:11

  Originally posted by K_ge_zi_wang:

  any workshop that is good in engine overhaul? can recommend me some?

  most engine workshops would be able to do it. i cun recommend u one personally as it can be quite a pricey and tedious job and i dun wanna get sued lata on if something goes wrong suggest u check around with ur frens which shop shop good with gti engines man.
  
  
• tailslide

  6 Jul 05, 17:17

  Originally posted by endless373:

  I doubt there is any diff in using 5W40 or 10w40 or 15w40 engine oil.
  the first figure (?w40) does not apply in sg context...
  
  Maybe for old engine, shld use ?w50 engine oil instead ?

  thats where u are wrong.
  
  tiger was correct in pointing out that using thicker oils will help old engines seal better but i can't agree that it is completely attributed to synthetic oils. some synthetics can be as iif not, even more viscous than mineral ones.
  
  the first number of the engine oil indicates the viscosity of the oil at its highest temp and the 2nd number refers to its viscosity when cold. the higher the number, the higher the viscosity (the "thicker" it is).
  
  dun tell me u tot the first number meant something else?
• endless373

  7 Jul 05, 10:33

  Originally posted by tailslide:

  thats where u are wrong.
  
  tiger was correct in pointing out that using thicker oils will help old engines seal better but i can't agree that it is completely attributed to synthetic oils. some synthetics can be as iif not, even more viscous than mineral ones.
  
  the first number of the engine oil indicates the viscosity of the oil at its highest temp and the 2nd number refers to its viscosity when cold. the higher the number, the higher the viscosity (the "thicker" it is).
  
  dun tell me u tot the first number meant something else?

  This is totally different from what I know... the first figure shld be the viscosity for very cold temperature (winter)... thus in sg context, no winter thus does not apply...
• tailslide

  7 Jul 05, 10:50

  Originally posted by endless373:

  This is totally different from what I know... the first figure shld be the viscosity for very cold temperature (winter)... thus in sg context, no winter thus does not apply...

  nope. its the other way around. dats y oils like mobile tri-synthetic got a "0" rating in front. it flows almost like water when its heated up.