I recently purchased a '95 and wanted to change the oil. I was informed to use Mobil One but I don't know what weight I should use. I live in Florida so I don't experience much cold weather but a friend uses 10W-30 in his '87. Should I use the same weight of oil?

 

i live in deltona fl. i use 10w -40 mobil 1, because it gets hot down hear and you will want a thicker oil that will not break down as easy in the heat.hope that helps

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Oil viscosity recommendations are based in a large part on internal engine clearances. If you have a stock engine and it has not had the clearances changed for extreme duty you should use what the manufacturer recommends.

 

GRABIE, . YOUR LT1 ENGINE IS NOT STOCK,AND WILL BEABLE TO HANDLE THE THICKER VISCOSITY OIL,

 

I use 0-40 Mobil 1, silver container. It is a premium (more costly than 10-30 Mobil 1) based on European specs now certified for the US, too, the original oil in Prosche Turbos.

 

I don't have access tonight to an owners manual for your car so I won't guess what it says for your stock LT-1 as far as oil viscosity. I did go to the Mobil web site at www.mobiloil.com and just for grins I found out what they recommended for viscosity for a stock 2006 Z06 and it was 5W-30. You can decide what you want to use, but just be aware that there are always people who think they know more than the factory. How much money do you think General Motors spent assuring that the Z06 would live on 5W-30? With the precision machining and very close tolerances in todays engines, I don't think I would want to use an oil, that because it was a heavier weight, had a more difficult time getting between the bearing surfaces than the lighter viscosity oil would. Heavy weight oil has it's place in engines that have been built looser for extreme duty. The key here is not what type of use is the engine subjected to, but what clearances has it been built with. I did not see any mention that your engine is anything but a stock LT-1. I understand that Ford is recommending the use of 5W-20 oil in some of it's products. Do you think using an oil with twice the viscosity rating like a 10W-40 is going to lube as well as the recommended oil? I think not! Let the rebuttals begin.

 

dude, do you live in florida.it gets so hot down hear the engine oil breakes down fast and thins out like water,i build race engines i think i now what im saying,may be up in omishville you can use 10-30 it is cold up there,in florida it is 93 right now,[hot]you read your books i no from experience. what do you drive anyway,you are new to this site and you already come off as a jerk whats up with that, we give advice hear from experience ,and we are family so what gives,???

 

I give advise based on engineering test data and real world experience, hardly text book information. If you find this intimidating, ignore me, you seem to be the only one complaining. No one forces you to use what I post. I too have built many drag racing engines. I have also built engines for dyno testing to destruction that have lasted many days, hundreds of hours at wide open throttle. Most of these engines were built to production specs and used the recommended oil and viscosity. I have tested vehicles pulling almost twice their rated towing capacity in the desert heat and -40 degree below zero weather. I felt my experiences would be useful to many on this site but as I say, you don't have to listen to me, what do I know! What do I drive? I have a 2005 Z06 Corvette, my wife drives a 2002 Tracker and my fun car is a 1962 Bel-Air Bubble Top with a built 327. It's not real fast, 13:60 in the quarter but sure surprises alot of people at the stop lights. It's sure been nice chatting with you! I look forward to many more usefull exchanges of personal data!

 

LOL!!!! YOUR FUNNY

 

If you are worried about heating and high ambient temperatures there is a 15-50 Mobil 1 available, too. But it is a pretty thick oil to have in a tight engine when you start it cold: let it warm up before driving.

If 15-50 is too much, you can mix viscosities in various amounts to get any thickness you want, but be sure to stick within one product line, mixing such as two weights of Mobil 1. By doing it right, you can get anything in between.

However, realize viscosities don't mix linearly (i.e. three quarts of 50 weight and three quarts of 20 weight to not necessarily make six quarts of 35 weight). The following web site permits you to enter the data and determine how to get the exact viscousity you want.

http://www.baseoils.shellglobalsolut...ending_pop.asp