Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Results 1 to 7 of 7

Thread: More OIL STUFF

  1. #1
    Join Date
    Jan 2003
    Location
    Illinois
    Age
    14
    Posts
    55

    More OIL STUFF

    I read that the most efficient oil for the Northstar and other newer engines is GF3 rated oils.

    Mobil One is rated at GF2 while some blends and non-synthetic oils are rated at GF3.

    I have been using a blend of synthetic and non-synthetic oil rated at GF3.

    I don't know which is better for the Northstar.

    The Factory recomends 5W-20/30 oil.
    Is it possible that the thin side of this oil (5 W) causes Northstars to burn or leak oil more rapidly?

    Pat


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    elwesso's Avatar
    elwesso is offline Cadillac Owners Master
    Automobile(s): 2005 CTS-V, 1994 Infiniti Q45
    Join Date
    Jan 2003
    Location
    Indiana
    Posts
    7,661
    I have always heard that if you can use 5w30, you can use 10w30. The EPA "edges" them to use 5w30 because since it is thinner, it gives better gas mileage. I dont think that using a thinner oil would make it burn more oil, but i can see where you are coming from. It would make sense that a little tiny bit of oil could get past the rings. I really dont think there is any way around the northstar using oil. Just think of it this way, you can use a little more oil or you can get your engine rebuilt every 100k.

    As far as the GF3 or GF2, im not sure what that is supposed to mean.

  4. #3
    Join Date
    Jan 2003
    Location
    Illinois
    Age
    14
    Posts
    55
    Lots of years ago I had a '54 Ford Victoria.
    Pretty car but it had lots of miles on it and burned as much oil as gas. Eventually I started putting straight 40 weight oil in it and that cut the oil consumption in half.
    So oil weight does make a difference but the difference between 5 W and 10 W is not much.
    Pat

  5. #4
    Join Date
    Jan 2003
    Location
    Camarillo, CA
    Posts
    8
    I don't think it makes much difference. I had always heard that the smaller the spead in viscosity, the more thermaly stable the oil. Living in southern California means that I don't worry too much about cold weather operation, so I use 10-30. My 94 went about 230,000 miles without any major engine problems, and the commpression was well within spec when I did the last tune-up at something less than 200,000 miles. It passed California emissions at the time of sale, so the engine had to be in fairly reasonable shape. And that was using whatever name brand oil was on sale at the time, no synthetics, and changing the oil generaly at 50 - 20% oil life remaining. And for the entire time that I had it, it used about 1 quart every 1500 miles. It had slight leakage around the middle, and the bottom pan but no drips. A weep might be a better description. So far at 108,000 miles our 97 is about the same, it might use a slight amout more oil. It developed a drip at about 50,000 miles and it was repaired under warranty.

  6. #5
    Join Date
    Feb 2003
    Location
    Ohio
    Posts
    59
    peatea, I read your post about you having a 54 ford. My first car was a 54 ford. It used-leaked oil too. I used to put GEAR LUBE in it to slow down the oil useage. Now I have an ELDORADO. Good to know I'm not the only one with good taste..LOL BTW I got the Biaritz(sp) type vinyl i/4 roof package on the Eldo. Rock On!

  7. #6
    Join Date
    Feb 2003
    Location
    Los Angeles
    Age
    74
    Posts
    1

    Oil consumption

    Yesterday I talked to a mechanic who works on Cadillacs exclusively. He recommended I use 10w-40 oil to reduce oil consumption on my 94 STS with 68000 miles.
    Any body try this?

  8. #7
    Join Date
    Feb 2003
    Age
    33
    Posts
    13
    mobil1 is the finest OTC oil out there... i wouldnt worry about GF2 GF3... mobil1 meets almost every mfg. spec out there...

    the 0w-40 meets mercedes 229.5 spec, one of six oils in the world to do so (for 35k drain intervals.. more likely, 15-20k)

    anyways, all the "synthetic" oils out there (valvoline, castrol, pennzoil, quaker state ETC. ETC.) are not true synthetics. they are group III hydrocracked oils, still petroleum basestocks. mobil 1 is the only one to use group IV stock (PAO/Ester based)


Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum