# 1994 Oldsmobile Cutlass Supreme V6 3.1L **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [February 16, 2008, 2:50am UTC](https://community.cartalk.com/t/1994-oldsmobile-cutlass-supreme-v6-3-1l/10705 "2008-02-16T02:50:52Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![brazenalter](https://avatars.discourse-cdn.com/v4/letter/b/4af34b/32.png) [@brazenalter](https://community.cartalk.com/u/brazenalter)\ **Post date:** [February 16, 2008, 2:50am UTC](https://community.cartalk.com/t/1994-oldsmobile-cutlass-supreme-v6-3-1l/10705/1 "2008-02-16T02:50:52Z")
I let Wal Mart change my oil. They put 10w/30 in my car and the cap states to use 5w/30. Six to eight hours after they oil change it stated to make a very loud knocking noise. It seem the noise is coming from the front lower portion of the engine. The car ran excelent before this. I mainatined it well and kept up with the oil changes, etc. 60k miles. Could using the wrong oil have damaged it? I live in Yuma, AZ. The weather here is anywhere between 58 to 70 degrees. JC ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [February 16, 2008, 3:40am UTC](https://community.cartalk.com/t/1994-oldsmobile-cutlass-supreme-v6-3-1l/10705/2 "2008-02-16T03:40:38Z")
While I can’t explain the knocking noise, using 10W30 oil won’t cause any damage. GM recommends most engines use 5W30 but in summer you can use the heavier 10W30. I have 2 GMs and change them back and forth in the fall and spring. ---
**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\ **Post date:** [February 16, 2008, 6:21am UTC](https://community.cartalk.com/t/1994-oldsmobile-cutlass-supreme-v6-3-1l/10705/3 "2008-02-16T06:21:41Z")
I can’t blame Wal-Mart. You can if you want to. Changing the oil at 60,000 miles isn’t a good idea, oh, that’s not what you meant. See if you have ANY oil in the engine. The oil filter might be loose or they put a quart in there just to be safe. ---
**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\ **Post date:** [February 16, 2008, 12:09pm UTC](https://community.cartalk.com/t/1994-oldsmobile-cutlass-supreme-v6-3-1l/10705/4 "2008-02-16T12:09:34Z")
I suspect it is not related, but it is possible. It is not due to the oil weight difference however what they gave you should be fine. Overfilling the oil is a possibility. Have you checked the oil level? Has the oil or CEL light come on?