Search results

Does engine oil have a "shelf life"? Does it degrade over time? How about engine oil that's 2 years old (fully synthetic) from the date of manufacture? OK to use? Thanks.

I know it's a transmission problem that needs expert attention. All I would like to know is the possible causes of this problem, so that I'm armed with some knowledge when dealing with the mechanic. The problem is: Transmission does not engage immediately when shifted into "D". It can take up...

Hi all, I recently discovered that I get a different reading (oil level) on each side of the dipstick. The dipstick tapers into a flat surface at the bottom, with the relevant level markings - "Max" and "Min" - on each side. One side shows a level somewhere halfway between Max and Min. The...

Hi all, I recently discovered that I get a different reading (oil level) on each side of the dipstick. The dipstick tapers into a flat surface at the bottom, with the relevant level markings - "Max" and "Min" - on each side. One side shows a level somewhere halfway between Max and Min. The...

This is what you see at www.mobiloil.com This is what I got. Are there 2 different designs, or, did they change it, again?

Can anyone decipher this? Thanks.

Can one tell an engine's "health" via the dipstick? Clean dipstick = clean, sludge-free engine? Blackened dipstick = dirty engine?

You know that "crack...crack...crack" like sound that comes when you make a turn. Is that the ball joint that connects the driveshaft to the wheel? Someone told me it happens when the rubber cover gets torn and dirt and sand get in there, and the grease gets out, thus wearing the ball joint...

How many of you keep your oil level at "Max" (dipstick marking)? Some say it's better to keep it slightly below "Max", somewhere between the halfway mark between "Min" - "Max" and "Max". Comments?

My car is on Royal Purple 5W-30. For the last oil change, my dad had to take my car to the oil change place because I didn't have the time. I need four 1-quart bottles because my car takes about 3.5 quarts. So, I always come back with one 1-quart bottle/container with about 0.5 quarts left in...

This is elementary, I know. Oil thickens as it cools and thins-out as it gets warm/heated up, correct? Someone just told me "No", multi-grade oils are designed to behave the opposite because of the VIs in them. Comments?

Someone told me that if you're on a "thin" oil (30-weight or less), never hold your revs above 3K RPM for like more than 15, 20 seconds. Ridiculous, I believe...but...decided to put this out and see what you guys have to say.

Does this mean all you GC users are in the US and Canada only?

What is generally the cause for transmissions to start slipping, apart from "old & worn"?

What is the difference, basically, between the API “Donut” symbol and “Starburst” symbol? My understanding is this: The “Starburst Icon” is a certification mark, whereas, the “Donut Icon” is a service symbol. The “Donut” indicates the “API Service Category”, i.e. SJ, SL, SM or CH-4, CI-4…etc...

What does Viscosity Index (VI) denote or signify? Is it the oil's ability to stay at, or near its original viscosity throughout its use? The ability to resist shearing down?

I'm new, so, I apologize if this has been discussed before. I'm still confused about transmission flushing. Many recommend it but, there are those who swear against it, saying it actually does damage. Which is it?