| Author | Topic |
|---|
Registered:
December 2002
|
|
|
I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
|
|
Re: Cheap Oil
|
Wed, 09 April 2003 11:43
 
|
 |
first of all never run cheap oil in an engine, oil is the main part of an engine its what keeps everything running and the quality of oil is the major factor for how much engine wear you will get,
why does your car use oil? well every single engine on the market today uses oil, some more so then others and most of the time its just due to the way you drive it, often people say there car doesn't use oil, well it actually does its just the oil gains other impurities ie, fuel carbon ect so it doesn't look like the level has dropped.
what causes your engine to use oil? well naturally some oil is going to find its way into the combustion champer and go out through the exhaust system but the main thing that causes this process to speed up is due to, first of all as the engine oil gets hotter it gets thinner which makes it easier for it to squize itself out into the combustion chamber or any other seal on the engine, it also gains impurities like fuel carbon and other crap which also causes the oil to thin out even more making it leak out of the engine more and more, and as the engine oil level gets lower and lower the hotter the oil will get therefor the thinner it will be and the more it will loose and it just keeps going in that cycle,
for example you have a car that uses 4L of oil in 4,000km thats in a situation where you filled it up with oil and then waited for it to use 4L before topping up again,
now if in the same engine you topped up the engine oil ever week to make sure its full then in that same 4,000km you may only have used 1.5L of oil, because the oil was always full due to you topping it up and therefor ran at a cooler temp meaning it didn't thin out and leak out of the engine.
now turbo cars this is very bad, as the engine oil gets much much hotter in a turbo power engine therefor it runs thinner and therefor looses more so you should keep a very good eye on the engine oil level in a turbo car and i feel all turbo cars must be fitted with decent oil coolers to help keep the oil down to an acceptable temp, WRX's have an oil cooler its mounted in the oil filter assembly and uses the coolant to cool the oil which does work but its only a very basic method the best way to go is a oil cooler mounted at the front of the vehicle air cooled.
i see brand new WRX's go out and come back for their 12,500km service and have no oil showing up on the dip stick, nothing wrong with the engine its just it has been driven hard and oil has not been topped up on a regular basis, Subaru actually put out a statement talking about all of this information "i'll try and get my hands on it if your interested" but they stated some sort of figure where they feel an engine using 3L of oil in 6,000km is an acceptable limit, thats based in the hardest of driving conditions.
if you want to be good to your car then change the oil and oil filter ever 5,000km instead of the usual 10,000km they often say 10,000km that's based on the fact you drive your car very slowly, if you really want to look after your car i suggest change every 5,000km, its all about the oil which keeps the engine young and fit, if you change it on a regular basis and use good quality oil then your engine should last for a very very long time with no problems at all.
another point to make is if your using fully synthetic oil, only put in the amount specified in the owners hand book, run the engine and get it up to operating temp then turn off and check oil again and then top up if required. why do this? because fully synthetic oil expands when its heated up it expands much more then mineral based oil so when its showing full on the dipstick at cold then it could show up as being overful once the engine is heated up, also never use fully sythetic oil when running in an engine, you should always use a synthetic/mineral mix oil, for inital run in then use your fully sythetic oil. this is because fully synthetic oil doesn't allow for the piston rings ect get set in properly.
sorry i've been going on for so long and much probably doesn't make any sense to you but i just want to make a point that oil is the most important and biggest factor in your car which will make the engine run at its peak and at its peak in 20 years time.
never use cheap shit oil and always change it on a regular basis "5,000km" and if you have a turbo'd engine then PLEASE fit an oil cooler!!!!
|
|
|
Registered:
December 2002
|
|
|
Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
|
|
Re: Cheap Oil
|
Thu, 10 April 2003 11:25
|
|
Oil quality is hardly going to cause damage to your engine, what it comes down to is how well the oil protects the engine from damaging itself (or being damaged by you!).
If you do have to use cheap oil I'd suggest you change it twice as often as good stuff (which will end up the same price as oil that's twice the price but needs to be changed less often) and take it very easy on your motor.
I like to think that I can't afford NOT to use the good stuff.
|
|
|
Club Member
Location:
Sydney, NSW
Registered:
May 2002
|
|
Re: Cheap Oil
|
Sat, 12 April 2003 03:55
|
|
Toyota Genuine 20W 50 SJ/CF Oil is an extremeley good oil...
It costs me $16 for 5 litres (cause I work there)... I think it might be around $30 for 5 litres for you ppl so it is a good oil at a good price...
|
|
|
Location:
Canberra
Registered:
December 2002
|
|
Re: Cheap Oil
|
Sat, 12 April 2003 04:18
|
|
I have to agree with GIN51E on this matter on average i use to do a engine rebuild every week on aeroplanes and the oil did make a difference to how the engine wore.
One example that i will use is this the charter company that i use to work for had a number of aircraft one in particular was called a Piper senica, it has two small turbo horizontal injected piston engines about 360 cubes each. They were rebuilt about 200 hours apart one was put on mobil oil and the other on penzoil. The engine on mobile seemed to always be glazing cylinders etc. the one on penzoil never had a problem but the most surprising thing was that the engine on penzoil after 1800 hours of operation still had the hone marks in the cylinder.
The reason for the two different oils was that the boss didnt want to pay the extra couple of dollars for the penzoil but in the end he paid extra in down time and in parts and labour.
You do the math. Thats my 2c worth
|
|
|
Location:
Oxenford/gold coast
Registered:
October 2002
|
|
Re: Cheap Oil
|
Sun, 13 April 2003 11:41
|
|
PUT A OIL PRESSURE GAUGE ON IT
IF TOO HIGH-LET ME KNOW
SOUNDS POINTLESS BUT MAY BE ABLE TO HELP U
GUS
|
|
|
