Would Synthetic Oil Make An Older Car Have Lower Oil Pressure
Posted in Crank, Oil and Piston | Asked on Jun 6, 2010
Below is the question about Would Synthetic Oil Make An Older Car Have Lower Oil Pressure, I know that I have a million questions were posted to my car but synthetic oil have an effect on the engine oil pressure? Because when I switched from regular to synthetic my motor does not run better and it seems to get better gas mileage, but the oil pressure shows on the dashboard of a lower oil pressure reading, why would that be? The engine is a GM 3rd 1L V6, with 163,000 miles. Even the engine is not leaking oil from the front or rear seals and I have all the seals are replaced on the engine when I propose for the first time the car three years ago. it can no oil leaks affect überhaupt.Wenn an oil filter oil pressure, than which brand I should go?
There are 6 Answers for "Would Synthetic Oil Make An Older Car Have Lower Oil Pressure"
most likely when you started using better oil, it got rid of all the junk that conventional oil leaves behind. and with less restriction, the oil pressure can be a little lower. and if it runs fine, leave it alone
some different brands of oil filters may affect your oil pressure by as much as 20 psi
The lower oil pressure is caused by the lower internal friction of synthetic motor oil.
With conventional oil, the molecules are irregularly shaped and sized. So when the oil has to flow through a passage the molecules have their own friction to overcome, making the oil harder to pump and therefore causing artificially high oil pressure.
With synthetic oil, the molecules are the same size and shape, because they are engineered that way, causing much less internal friction and therefore slightly lower oil pressure, but more volume of oil. This lower friction is also responsible for the cooler operation, and increased efficiency(read better fuel mileage) of engines lubricated with synthetics.
Great question, glad to hear you are having success with synthetic motor oil. I am a distributor of Amsoil synthetic lubricants. Check out some of these links for more info:
Amsoil vs. Mobil-1 and others:
http://www.amsoil.com/redirect.cgi?zo=1463115&page=performancetests/g1971/index
Browse Amsoil products:
http://www.amsoil.com/redirect.cgi?zo=1463115&page=products
environmental benefits: http://www.amsoil.com/lit/g1059.pdf
yes it does…
Synthetic oil was originally developed for high performance racing engines. Mobil tried to popularize synthetic oil for passenger vehicles back in the early 1970′s. At the time, Mobil was promoting 20K or 25K oil changes with synthetic, but they soon backed down from this. Synthetic oil is a good choice if you have a vehicle with a high performance engine (in fact synthetic is required for many of these engines). It is also a good choice if your vehicle is operated in extremely cold climates. It has higher resistance to breakdown caused by heat and it flows better in extreme cold. Unfortunately for the synthetic oil industry there is virtually no advantage to using synthetic oil in a non-high performance engine that is operated in moderate climates. You probably could go a bit longer between oil changes with a synthetic, i.e. following the normal service schedule even if you fall into the severe service category, but I wouldn’t advise this. In short, synthetic may give you the peace of mind of knowing that you are using an oil that is far better than necessary for your vehicle, but it won’t reduce wear or extend the life of the engine. The mistake some people make it to wrongly extrapolate these benefits onto normal engines operated in mild climates, with the ultimate lack of any knowledge being manifested with statements such as “synthetics provide ‘Peace of Mind,’ or ‘Cheap Insurance,’” or other such nonsense.
and about filters…
Manufacturer Filters
This is usually the best choice for your vehicle.
Aftermarket Filters
These are filters made by companies like Fram,Wix, Motorcraft, Lee, AC/Delco, Bosch, Casite, Hastings, Pennzoil, Valvoline, and Purolator. The quality of these filters varies greatly. In many cases the auto manufacturer uses these filters themselves. Private label filters are made by these companies as well.
Trade Brand Filters
These are filters made for the oil change industry. They are actually no worse than the poorer quality aftermarket filters. You can’t buy these at an auto parts store but you’ll see them used at many of the quick oil change places.
Premium Filters
Some manufacturers of synthetic oil also make so-called synthetic filters. These are high priced and have not been proven to provide any benefit over a high quality manufacturer of aftermarket unit.
If you are using a lighter weiight oil it may affect your oil pressure. If you are unsure, switch back to regular oil and see what happens.
no synthetic has the same viscosity as normal oil.