17 years ago on my first used GN purchase I switched from conventional oil to synthetic {mobil1 I believe}. Within a week I had a flat cam lobe. Maybe it was just coincidence but who knows. I just purchased one here this weekend that is running conventional Valvoline 10w30, and I want to switch to synthetic. 54000 miles BTW. Should I sweat it?
Synthetic oil question.
- Thread starter davidf
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DailyDrifter
The Slow and the Curious
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- Dec 5, 2007
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- 5,118
You need Zddp additive...................or a roller cam. I use Amsoil in my nissan and love it.
jasjamz
THS Racer
- Joined
- Sep 30, 2004
- Messages
- 5,982
Does the car you have now have a flat tappet in it? If it does, expect the same outcome if you do. Use oils with high zinc and a supplement like the one the vendors sell. Kirban has a popular one.
Completely stock valve train.
JDSfastGN
Well-Known Member
- Joined
- Jun 16, 2001
- Messages
- 3,506
why even take the chance. I don't like synthetic even with the additives on a flat tappet setup. Just run the valvoline. Engines running conventional oil have lasted many thousands of miles
Thats good enough for me.
Scott89TTA
Well-Known Member
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- Jul 12, 2005
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- 1,150
If you are running Valvoline Racing oil you will be fine...VR1, VR1 Synthetic, Valvoline Racing "not legal for street" all have the added Zink/Phosphorous for high performance flat tappet cams. From what I understand the "not legal for street" is the favorite and has the most Zink/Phosphorous. I switched from synthetic Mobil 1 10w30 to conventional VR1 Racing 10w30 when I installed the 100lb valve springs and few years ago...no problems so far.
Valvoline.com > Products > Motor Oil > Racing Motor Oil
-Scott
Valvoline.com > Products > Motor Oil > Racing Motor Oil
-Scott
