# Car's oil

**URL:** <https://community.cartalk.com/t/cars-oil/51570>\
**Category:** Maintenance/Repairs\
**Tags:** mazda, oil\
**Created:** [July 10, 2010, 11:31am UTC](https://community.cartalk.com/t/cars-oil/51570 "2010-07-10T11:31:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![hamleshooka](https://avatars.discourse-cdn.com/v4/letter/h/90ced4/32.png) [@hamleshooka](https://community.cartalk.com/u/hamleshooka)\
**Post date:** [July 10, 2010, 11:31am UTC](https://community.cartalk.com/t/cars-oil/51570/1 "2010-07-10T11:31:28Z")

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My car,Mazda RX-8(High performance car)has roughly 20505 miles on it. Car’s been not in use during the winter for full 3 months. There are now residues in the car’s oil. Should I change the oil? Appreciate having more info on the oil change, prices, etc. This car only takes Dexelia Ultra 5W 30.

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [July 10, 2010, 12:04pm UTC](https://community.cartalk.com/t/cars-oil/51570/2 "2010-07-10T12:04:44Z")

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Yes, you should change the oil. When in doubt, change it out.

For more information on the subject of oils and oil changes, let me suggest a visit to [www.carbibles.com](http://www.carbibles.com).

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [July 10, 2010, 12:14pm UTC](https://community.cartalk.com/t/cars-oil/51570/3 "2010-07-10T12:14:55Z")

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Yes, change the oil. The rotary engine requires more frequent oil changes than a conventional piston engine. The quickest way to damage a rotary is to ignore its oil requirements. The second quickest is to allow it to overheat.

Follow the recommendations in the owner’s manual for oil change frequency. There is a mileage frequency and a time frequency, whichever comes first.

Oil is cheap. Engines are expensive. Change the oil if you even THINK it should be changed.

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**Author:** ![common-sense-answer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/common-sense-answer/32/716_2.png) [@common-sense-answer](https://community.cartalk.com/u/common-sense-answer)\
**Post date:** [July 10, 2010, 12:39pm UTC](https://community.cartalk.com/t/cars-oil/51570/4 "2010-07-10T12:39:00Z")

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Does The Mazda’s Owner’s Manual Specify Only Dexelia Ultra 5W-30 ? Are You In The U.K. ?

CSA