# 1999 Mercury Grand Marquis - which gas **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** mercury, grandmarquis\ **Created:** [March 18, 2019, 5:54am UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693 "2019-03-18T05:54:26Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![charles24](https://avatars.discourse-cdn.com/v4/letter/c/e19b73/32.png) [@charles24](https://community.cartalk.com/u/charles24)\ **Post date:** [March 18, 2019, 5:54am UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/1 "2019-03-18T05:54:26Z")
what gas is a nono for a 99 merc ls or can I use all gas that is top tier has ethanol ? ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [March 18, 2019, 10:34am UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/2 "2019-03-18T10:34:18Z")
A 99 should be fine with the “contains upto 10% ethanol” gas. Not designed for higher ethanol gas. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [March 18, 2019, 11:56am UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/3 "2019-03-18T11:56:05Z")
Agree w @Purebred. Just stay away from E85 ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [March 18, 2019, 8:52pm UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/4 "2019-03-18T20:52:06Z")
I’ve seen E15 around here lately. What about that? ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [March 18, 2019, 9:06pm UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/5 "2019-03-18T21:06:07Z")
Not on a 1999, I wouldn’t! Old fuel lines, old rubber seals, old pump impeller… they just don’t need that stress. ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [March 18, 2019, 10:25pm UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/6 "2019-03-18T22:25:37Z")
If you still have your owners manual, see what fuel it recommends. ---
**Author:** ![melott](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/melott/32/10827_2.png) [@melott](https://community.cartalk.com/u/melott)\ **Post date:** [March 18, 2019, 11:19pm UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/7 "2019-03-18T23:19:04Z")
It wants regular. I agree no more than 10% ethanol. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [March 19, 2019, 1:03am UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/8 "2019-03-19T01:03:08Z")
Doesn’t the Costco gas contain up to 10% ethanol, according to the labeling at the filling station . . . ? If op is a member, I’d just get gas there ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [March 19, 2019, 1:19am UTC](https://community.cartalk.com/t/1999-mercury-grand-marquis-which-gas/136693/9 "2019-03-19T01:19:21Z")
Along with any other brand of gas, pumps are clearly labeled.