Go to this site, scroll to the very bottom. There is a gray bar with a "Contact Us". Click on it. Shazaam Email.
http://www.mobiloil.com/USA-English/..._1_10W-30.aspx

 

I believe it is not supposed to be in the Vette, although I have not checked it.

I would just change it; I am sure you have not hurt anything, but I would get it out.

 

high mileage oils generally have additional amounts of two components
- extra detergent to help clean up any sludge
- extra seal swell components to help slowdown/eliminate leaks.

 

Not a big Walmart fan but they have unbeatable pricing on jugs of Mobil 1, more oil per jug at a better price that any other car parts store.

 

Still having connections in the Ford Service loop one thing they discussed was the need for 5W-20. You are correct, it is used to increase CAFE numbers. I also agree that there is very little difference between 5W-30 Mobil 1 and 5W-20, especially during cold starts. I did however read a Ford TSB concerning the use of heavier oils than 5w-30 in cold climates.
An engine designed to use 5W-20 has tighter bearing clearances, (by as much as .0007) than earlier production engines. This is mainly due to the "cracked sintered connecting rod technology" in modular engines, and tighter machining tolerances. 5w-20 standard oil, which uses a 20W base as opposed to a 30W base has better pumping characteristics in colder climates. (we are talking NON-synthetic oils) Oil deprivation on startup is the single most cause of engine wear in a vehicle. Anyrate the jist of the TSB stated that the use of heavier weight oils MAY cause
startup lubrication issues and oil pump damage in cold climates. I really don't think there is much of an issue with using a 5W-20 oil in summer, due to the tighter bearing clearances. Remember, once an engine is warm in summer it's temperature is regulated by the vehicle thermostat and cooling system. And, to it's credit I haven't seen burnt-up or coked oil in engines since the early '80's. Engine oil in all flavors has improved for the better! Yes, I'm like you, I like the best of all marques, I just change my baseball hat with the brand I'm driving that day! Have a good one,
John

 

I used 5w30 in my LT1 with 100,000 miles on it & when it was hot outside, it would have lifter tapping when first starting it. I changed to 10w30 & had no problems.

 

I agree that using an oil heavier than 5w-20 or 5w-30 in cold temperatures is a very bad idea. In fact I've started using Mobil's newer 0w-40 in our Explorer.

On the other hand, it's always been my understanding that a multi-vis, non-synthetic oil is based on the lower viscosity oil (5w in the case of 5w-20) and then viscosity index improvers are added to make it a 20 weight oil at operating temperatures.

Here's a chart (that I've posted on other threads) with viscosities (cSt) at a range of temperatures for a couple of Mobil 1 oils. I got them from Mobil's technical department when I was still working.

Temp------5w-30------15w-50

-20----------6284-------21,852
0------------2129---------6462
25------------697---------1836
50------------281----------657
100------------71----------138
150------------27------------46
175------------18------------30
200------------13------------20
225------------10------------15
250-------------7.6----------11.1

The bearing clearances may well need 5w oil during startup----especially at the temps we start engines at during a Minnesota winter !!

But, as you can see, a 5w-30 oil won't hurt anything as its viscosity will be the same as a 5w-20 oil at cold temps----around 2100 cSt at zero degrees. If the bearings survive with this viscosity, they will sure survive with 5w-30 oil viscosity of only 13 cSt at 200 degrees vs 9-10 cSt for 5w-20 oil at 200 degrees.

Another interesting thing about Ford's oil recommendations is that they recommend 5w-30 oil in the Explorer V6 which has the same "cracked" rod design as other Ford module engines .

As I said before, I use the 15w-50 oil during the summer in their engines (when used for towing) without issues. I sure wouldn't use it, however, if I needed to start the engine when it was freezing !!

 

Okay,,,, I see it now,, Thanks, I missed it.:o I just sent them an email.

 

[QUOTE=silverbullit99;1563773942]Hi,, I was out looking to pick up some Mobil1.
They had a variety of Mobil1, Performance 5-50, High Mileage, New car, etc. Any idea what these are all about. I read on the Mobil1 site that High mileage was for cars that were high mileage that used the regular oil and wanted to switch to synthetic. This would help clean out the sludge from the old oil. The Performance is for racing type driving. But they do not talk about Mobil1 new car oil. I noticed when I got home that my last oil change I used the New Car Mobil1 oil, was that a bad thing? The vette has 60k miles.

I was looking for the regular synthetic Mobile1 5-30, but all they had was 5-20.
Is there much difference in the two.

Some sarcastic person might say: "About 50 cents." Fortunately, we don't got none of them sarcasm guys round here.

 

[QUOTE=z06Bigbird;1563817656]The 5w-20 will be about the same viscosity at cold startup but will be 20-30% thinner at 200 degrees than the 5w-30 oil !! That's not good considering the temp the oil in our cars run at.

 

I use the 5W-50 Performance synthetic. The GM spec, or new car oil has less zinc and manganese anti wear additives than the performance or high mileage oil. This is due to EPA required cat converter warranty's.

Russ Kemp

 

I buy my oil from them and my oil filter at Auto Zone or on post (AAFES) and then take my car to the dealer to have my oil changes done. The dealer knocks off all but 20 bucks off my oil changes

 

I buy oil at Walmart, Filter @ Napa, and change it by myself and then take the old lady out to dinner on what I saved.

 

Personally I switched from Mobile 1 to Amsoil. I use 10-40 in my FRC and 0-30 or 5-30 in my Z06 (the 0-30 meets the GM Standard 4718M) I know some people dont like to use Amsoil because it's harder to get, but I just order it a couple weeks before im due for an oil change.

 

To confirm what has been mentioned above, the factory fill is the normal Mobil 1 5w30, not the extended performance or any other version. This base Mobil 1 is labeled to meet GM Standard 4178M.

As for the thoughts of 5w20, I wouldn't use them in my car as I believe the viscosity is too low at a nominal warm oil temp. For my track car, I've gone to using a high performance 10w40 which has much higher levels of ZDDP anti-wear additives and has a higher viscosity at the temps I typically see at the track.

 

I'm not the most mechanically inclined owner

 

Lol you serious? An oil change takes about 10 mins with most of the time just waiting for it to drain, You dont have to be mechanically inclined to do an oil change by any means

 

You must have a lift in your garage. It'll take me 15-20 minutes to get the car on ramps so I can get a jack under it; then get one end jacked up and jack stands placed under that end; and then the other end up and jack stands under it.

 

Black N Tan: Just in case you are not aware of it. Loose the Rotella for the diesel and use Mobil 1 fully synthetic. You can then change filter at 5000 add a couple quarts and do this for 15000 in the truck and it will serve you very well. I and several others that I know are doing this and a couple have in excess of 300000 miles on the engines. Mibil one IS diesel certified!!!

SilverBullet99: 5w 20 will do well up in Canada in the winter time where it super cold. But go to the 5w 30 in the late spring for the warmer weather. And use FULLY SYNTHETIC oil.
Mobil Oil a part of ExxonMobil Corp.- Beaumont TX refinery!

 

For what it's worth, me and another poster have gotten verification from Mobile that Mobile 1 EP 5W30 does meet the standard. Why it's still not written on the bottle makes me wonder though.

http://forums.corvetteforum.com/show....php?t=1670954

http://forums.corvetteforum.com/show....php?t=1691631