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Gremlin X 343 Oil |
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betanu961
AMC Fan Joined: Oct/24/2017 Location: Asheville, NC Status: Offline Points: 8 |
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Posted: Feb/18/2018 at 10:08am |
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I searched but couldn't find any information on this.
I have a 1974 Gremlin X with a 343 V8. I generally use 10w30 conventional oil. Anyway, when I took it in for regular service they changed the oil out and put 75w90 synthetic in its place (not sure why). Will this cause any issues?
Edited by betanu961 - Feb/18/2018 at 12:54pm |
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73hornut
AMC Addicted Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3132 |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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amxdreamer
AMC Addicted Joined: Jul/30/2008 Location: Vancouver, BC Status: Offline Points: 8494 |
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or maybe 15w30...either way it will be fine.
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Tony
Vancouver, BC 1970 AMX 1972 Badassador AMO#10333 |
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401MATCOUPE
AMC Addicted Joined: May/20/2010 Location: Salisbury, MD Status: Offline Points: 5370 |
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Depending on the health of the engine, you might start seeing oil leaks with synthetic oil after a life time of Conventional Oil. If that 343 had a lot of miles, I have seen some engines start to use oil too....proceed with caution.
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Ross K. Peterson
68X,GoPac,343,AT,52A(1stCar) 68X,GoPac,390,4sp,52A 69X,GoPac,390,4sp,64A 70X,GoPac,390,4sp,87A,8 70X,GoPac,390,4sp,BBO,8 70 Jav SST,390,AT,BSO 74MatX,401,AT,Prototype 74MatX,401,AT |
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betanu961
AMC Fan Joined: Oct/24/2017 Location: Asheville, NC Status: Offline Points: 8 |
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Not entirely sure how many miles were on the engine before it was installed into the Gremlin. It came from a Javelin.
Do you think it would be prudent to drain the synthetic and put in 10w30 again?
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betanu961
AMC Fan Joined: Oct/24/2017 Location: Asheville, NC Status: Offline Points: 8 |
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Sorry, it was 75w90.
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jav343
AMC Nut Joined: Sep/26/2011 Location: CO Status: Offline Points: 293 |
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75W90 is gear oil... |
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2000 Dodge Durango SLT 4.7L, 1997 Jeep Wrangler 4.0L, 1968 AMC Javelin 5.6L
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tyrodtom
AMC Addicted Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6199 |
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There isn't a 75w90 engine oil either.
The thickest synthetic I've heard of is 15w50, though some specialty makers may make something a little thicker, but nobody even approaches 75w90 territory for engine oils. 75w90 is in the weights that gear oils commonly come in , no even semi-experienced mechanic would put that in a engine. I think you heard them wrong. Or did they change your rear end oil too? First, you need to find out what they really put in your engine.
Edited by tyrodtom - Feb/18/2018 at 2:16pm |
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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amc67rogue
AMC Addicted Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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Sniff the oil on the dipstick ,Gear oil usually has a sulpher oder to it.
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Keith Coggins 67Rogue X code
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Lyle
AMC Addicted Joined: Jul/17/2014 Location: None Status: Offline Points: 772 |
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Take it back and have them change the oil again (for free) if the receipt states 75W90 or have a different shop change the oil.
Gear oil should not be in an engine and I wouldn't gamble on an engine for the sake of an oil change.
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