dazz33 Posted May 10, 2012 Report Share Posted May 10, 2012 Well there i was done a full service on my car. New oil & filter....... I used Castrol Magnatec part synthetic oil 10-40w Pollen filter Air filter Spark plugs Fuel filter All genuine GM parts so whats the prob with my car.......After doing the oil and filter change my oil light has come on.! BUT it only comes on while idling.? BUT NOT when driving.!? She drives fine and smooth other than the light. The oil on dipstick is just under max. So anyone know what the problem might be.? Im guessing either wrong oil...........It says to use 05-40w or 10-40w semi synthetic ( ive used part synthetic ) are they the same.? Or maybe a faulty oil pressure switch.?( will check tomo to see if there is any oil leaking ) Or oil level sensor Going for the cheapest option first..... Quote Link to comment Share on other sites More sharing options...
liner33 Posted May 10, 2012 Report Share Posted May 10, 2012 I'd change the oil first then get the pressure checked Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 10, 2012 Report Share Posted May 10, 2012 oil will be fine if only at idle it sounds very much a pressure problem, possibly and hopefully just the switch Quote Link to comment Share on other sites More sharing options...
SMARTLY Posted May 10, 2012 Report Share Posted May 10, 2012 Was the light off before you changed the oil? Did you look at the consistency of the old oil? Hopefully if it was OK before then you have just pulled a wire off on the pressure switch. Quote Link to comment Share on other sites More sharing options...
liner33 Posted May 11, 2012 Report Share Posted May 11, 2012 If a wire was off the switch then it would stay on all the time The engine oil pressure is lowest when hot and idling , whilst 10-40 should be fine but the opening "Well there i was done a full service on my car" makes little sense and doesnt make clear whether the op serviced the car himself or had a dealer do it , if its the latter then perhaps the wrong oil was used a lower weight oil would give less pressure at idle The oil pressure switch could well be faulty but remarkable co-incidence to fail straight after an oil change and they dont often fail like that in my experience they tend to flash intermittently, stay on or just not work at all . Quote Link to comment Share on other sites More sharing options...
Tony Posted May 11, 2012 Report Share Posted May 11, 2012 It's a write off mate Nah not really had you worried there..... As said oil pressure switch methinks. Quote Link to comment Share on other sites More sharing options...
hms Posted May 11, 2012 Report Share Posted May 11, 2012 Oil is within spec. Let the car get cold, wipe dipstick and recheck. I suspect it's low. h Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 11, 2012 Author Report Share Posted May 11, 2012 Well i done the service myself...The sump capacity is 4 litres and thats what i used...put half in then let it settle......then the rest in until it reached the upper MAX mark......went for a drive......came back.....waited 5mins then re-checked and its on the MAX mark on dipstick.... And i used castrol magnatec 10-40w and thought that would be ok.? I know all the previous services where done by a main dealer and they used 10-40w GM vauxhall oil I have a 1 litre bottle of GM oil indoors from my corsa So i checked the two oils together and i must say the CASTROL OIL seems to be MORE THICKER than the GM oil..? So maybe the oils to thick.? I will change the oil again first off and then change the oil npressure sensor if still goes on as they are about £5 of Ebay... Should i use a thinner oil like 5-30w 5-40w ? something like MOBIL 2000 Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 11, 2012 Author Report Share Posted May 11, 2012 Was the light off before you changed the oil? Did you look at the consistency of the old oil? Hopefully if it was OK before then you have just pulled a wire off on the pressure switch. The light has never been on before. The old oil was dark brown and slightly thicker than new oil Quote Link to comment Share on other sites More sharing options...
SMARTLY Posted May 11, 2012 Report Share Posted May 11, 2012 I'm just wondering whether maybe somebody had added something to it to make it thicker to sell it ( I know a friend who bought a car that had similar experience to you, and that had the oil thickened to sell hence no warning lights / guages ). Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 11, 2012 Author Report Share Posted May 11, 2012 Ive had the car for a year now I brought it and after i had it for a few months i had the oil changed by a family friend who i trust as hes a mechanic and has his own garage in sarratt. after he had changed the oil i never had any problems UNTIL i changed it at the weekend. Just find it strange the light come on after it was changed..... Should i use 5-30w or 5-40w oil.? any reccomendations regarding the best oil to use.? It will be my 1st port of call and then the oil pressure sensor.. Quote Link to comment Share on other sites More sharing options...
Viking Posted May 12, 2012 Report Share Posted May 12, 2012 Although Castrol is crap, it's the correct spec so I doubt that's the problem. However, I've heard of faulty (or even incorrect) oil filters causing this very problem, so personally I'd double check the part number for your engine, buy another filter, and swap it over to make sure. Cheapest option. After that I'd suspect possibly the oil pick up pipe in the sump blocked (or partially) and not enough oil being supplied at tickover to the pressure switch. Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 12, 2012 Author Report Share Posted May 12, 2012 Although Castrol is crap, it's the correct spec so I doubt that's the problem. However, I've heard of faulty (or even incorrect) oil filters causing this very problem, so personally I'd double check the part number for your engine, buy another filter, and swap it over to make sure. Cheapest option. After that I'd suspect possibly the oil pick up pipe in the sump blocked (or partially) and not enough oil being supplied at tickover to the pressure switch. Hi viking... The oil filter is a genuine GM one and purchased from vauxhall and the codes tally up with the make model of my car.... How would i check if the oil pick up pipe in the sump is blocked.? where would i find the pipe on my car...and is it easy to check and sort out myself.? Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 12, 2012 Author Report Share Posted May 12, 2012 Although Castrol is crap, it's the correct spec so I doubt that's the problem. However, I've heard of faulty (or even incorrect) oil filters causing this very problem, so personally I'd double check the part number for your engine, buy another filter, and swap it over to make sure. Cheapest option. After that I'd suspect possibly the oil pick up pipe in the sump blocked (or partially) and not enough oil being supplied at tickover to the pressure switch. Also what oil would you say is better.? Mobil 2000.? or comma.? Quote Link to comment Share on other sites More sharing options...
scorps Posted May 12, 2012 Report Share Posted May 12, 2012 where would i find the pipe on my car...and is it easy to check and sort out myself.? Take the sump pan off (if accessable)and you'll see it. Quote Link to comment Share on other sites More sharing options...
Viking Posted May 12, 2012 Report Share Posted May 12, 2012 Also what oil would you say is better.? Mobil 2000.? or comma.? Mobil all the way for me. There's nothing better for an engine than the best oil you can give it. As said, sump off to check the oil pick up pipe. However, I think the filter on those engines is a paper element type which drops into the housing, correct? Are you sure all the o rings were fitted / changed correctly when you fitted it? Also, just checked the Vauxhall section of Opie oils and they recommend 5w 40 for your engine. Where did you get the 10w 40 recommendation from? Not sure if Opie have it correct or not, but usually they're spot on. Quote Link to comment Share on other sites More sharing options...
Viking Posted May 12, 2012 Report Share Posted May 12, 2012 Although a quick Google implies that up to 2001 should be 10w 40 and after that should be 5w 30. As is usual with oil specs, so many people speak knowledgeably on the subject when all they know is what the local garage put in their engine at the last service. I've litle knowledge of Vauxhall specs I'm afraid, but personally I'd run with a good quality 5w 40 oil if there was any doubt. 10w 40 is just too thick for me. Quote Link to comment Share on other sites More sharing options...
ChannelZ Posted May 12, 2012 Report Share Posted May 12, 2012 1.2 16v Corsa should be 5W30 or 0W30 - 10W40 is just plain wrong. Last Vauxhalls to use 10W40 are the old 8v engines from the 90s. Quote Link to comment Share on other sites More sharing options...
Tony Posted May 12, 2012 Report Share Posted May 12, 2012 Oilman "shout!". Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 13, 2012 Author Report Share Posted May 13, 2012 where would i find the pipe on my car...and is it easy to check and sort out myself.? Take the sump pan off (if accessable)and you'll see it. Ok cool thanx scorps. Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 13, 2012 Author Report Share Posted May 13, 2012 Although a quick Google implies that up to 2001 should be 10w 40 and after that should be 5w 30. As is usual with oil specs, so many people speak knowledgeably on the subject when all they know is what the local garage put in their engine at the last service. I've litle knowledge of Vauxhall specs I'm afraid, but personally I'd run with a good quality 5w 40 oil if there was any doubt. 10w 40 is just too thick for me. Thanx for the help viking.... The reason i put 10-40w oil in is looking at the service history ( All vauxhall service history,book,sheets etc ) they used 10-40w.... BUT...I do remember thinking the castrol oil i got was rather thick.... Well looks like ill have a little project to do tomo if i get a chance. Ill get some new oil .....Mobil 05-40w and see if that helps. After that if the lights still on ill change the oil pressure swtich as i have a new one and go from there.....im hoping its just the oil and nothing to serious. Ill keep u updated on how i get on.....Thanx for all the help.!!! Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 13, 2012 Author Report Share Posted May 13, 2012 Oilman "shout!". Oilman...any idea.? Quote Link to comment Share on other sites More sharing options...
Viking Posted May 14, 2012 Report Share Posted May 14, 2012 I'm willing to believe that 5w 30 is correct if someone more knowledgeable says so (ChannelZ) so don't take my recommendation of 5w 40 too seriously. That would be a good middle ground choice for me but if 5w 30 is what should be used then run with that. On a side note, SEAT dealers are notorious for not knowing (or caring) what oil goes in a customers engine as long as it's cheap. I'm not saying Vauxhall are the same, but just because they use 10w 40 it doesn't mean that's correct. Also, oils of the same grade can be thicker or thinner depending on manufacturer so Vauxhalls oil might keep the oil light off even though it's the same spec as the stuff you used. Maybe a call to Opie on the phone would be a help. Link. Either way, good luck with the oil change. Quote Link to comment Share on other sites More sharing options...
liner33 Posted May 14, 2012 Report Share Posted May 14, 2012 Seat should only use VAG approved oils they have their own specification Oil too thick wont cause oil pressure issues , the opposite really , oil pressure is resistance to flow so thicker oil is harder to push around the engine so pressure will go up This fault is not related to the oil grade I'd get the oil pressure checked Quote Link to comment Share on other sites More sharing options...
dazz33 Posted May 14, 2012 Author Report Share Posted May 14, 2012 Seat should only use VAG approved oils they have their own specification Oil too thick wont cause oil pressure issues , the opposite really , oil pressure is resistance to flow so thicker oil is harder to push around the engine so pressure will go up This fault is not related to the oil grade I'd get the oil pressure checked Hi thanx for your help liner33 Ive never had a problem before i done the service the other weekend....The oil pressure light has never come on before. I would find it hard to see that there could be a serious problem after an oil change..... Quote Link to comment Share on other sites More sharing options...
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