# Synthetic or regular?

**URL:** <https://community.cartalk.com/t/synthetic-or-regular/3488>\
**Category:** Maintenance/Repairs\
**Created:** [August 22, 2007, 4:33pm UTC](https://community.cartalk.com/t/synthetic-or-regular/3488 "2007-08-22T16:33:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![scmino](https://avatars.discourse-cdn.com/v4/letter/s/d26b3c/32.png) [@scmino](https://community.cartalk.com/u/scmino)\
**Post date:** [August 22, 2007, 4:33pm UTC](https://community.cartalk.com/t/synthetic-or-regular/3488/1 "2007-08-22T16:33:20Z")

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I have a newly rebuilt Chevy 454. The break-in 750 miles are complete. Any recommendations as to whether the new oil should be synthetic or regular?

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**Author:** ![renman07-cartalk](https://avatars.discourse-cdn.com/v4/letter/r/47e85d/32.png) [@renman07-cartalk](https://community.cartalk.com/u/renman07-cartalk)\
**Post date:** [August 23, 2007, 12:58pm UTC](https://community.cartalk.com/t/synthetic-or-regular/3488/2 "2007-08-23T12:58:28Z")

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Suggest Amsoil or Redline 100% pure synthetic. NOT Castrol Syntech(is a crack crude oil false synthetic. Mobil 1 ok in a pinch. Amsoil has great filters too. Longer times (10-20k mi) between chngs. Can have lubes analysed by lab to see how ur engine is doing ! Crude oil says it all…crude as a modern lube today and doesn’t last as long.

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**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\
**Post date:** [August 23, 2007, 3:22pm UTC](https://community.cartalk.com/t/synthetic-or-regular/3488/3 "2007-08-23T15:22:09Z")

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The engineers who designed and tested this engine assumed that users would be using crude (regular) oil. They have found this product to be satisfactory as a lubricant. There is no need to use synthetic oil; it’s primarily a matter of discussion between you and your wallet.

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**Author:** ![armtdm](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/armtdm/32/26_2.png) [@armtdm](https://community.cartalk.com/u/armtdm)\
**Post date:** [August 23, 2007, 9:58pm UTC](https://community.cartalk.com/t/synthetic-or-regular/3488/4 "2007-08-23T21:58:30Z")

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either is fine, to justify the synthetic cost you need to extnd the change interval whihc is fine depends on which one lets you sleep at night