# Compression **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [February 6, 2009, 1:05pm UTC](https://community.cartalk.com/t/compression/26116 "2009-02-06T13:05:07Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![iirrig8](https://avatars.discourse-cdn.com/v4/letter/i/edb3f5/32.png) [@iirrig8](https://community.cartalk.com/u/iirrig8)\ **Post date:** [February 6, 2009, 1:05pm UTC](https://community.cartalk.com/t/compression/26116/1 "2009-02-06T13:05:07Z")
1993 non turbo 300zx i need to know what is acceptable compression now i have 95-105 on all cylinders car needs an injector and front main seal it has 142000 miles should i repair or be looking for another motor ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [February 6, 2009, 2:37pm UTC](https://community.cartalk.com/t/compression/26116/2 "2009-02-06T14:37:51Z")
Stock engines (no radical cam) should be at least 140. Squirt a little oil in each cylinder. If that makes the #'s go up it’s rings. ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [February 6, 2009, 2:47pm UTC](https://community.cartalk.com/t/compression/26116/3 "2009-02-06T14:47:17Z")
The compression test needs to be done when the engine is as near normal operating temperature as possible; otherwise, the test will be invalid. This is a short review of the car: [http://consumerguideauto.howstuffworks.com/1990-to-1996-nissan-300zx.htm](http://consumerguideauto.howstuffworks.com/1990-to-1996-nissan-300zx.htm) ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [February 6, 2009, 3:10pm UTC](https://community.cartalk.com/t/compression/26116/4 "2009-02-06T15:10:26Z")
That, and it needs to be done correctly (throttle plate open, all plugs out). OP, was it done correctly?