Quote:
Originally Posted by ZL*Won
Taking in the Z in for the 3K service. Planning to take to track soon. Thinking I need to change out rear diff fluid with Mobil 1 oil....any suggestions on exact type of rear diff fluid to use for track? Other suggestions? Thanks.
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[Engine]
Definitely change the motor oil if you haven't done that already. Dealer should do that free the first few times. I changed mine after the first 600 and 1200 miles, then about every 6 drag strip visits. If the dealer changes it you'll get AC Delco dexos 1 5W30. When I changed it in Summer I used Amsoil Dexos 2 5W40. That's what you should go with if you take it on a road course.
From Amsoil Dealer:
Amsoil European Car Formula 5W-40 Improved ESP Synthetic Motor Oil
Case of 4 Gal: $119.00 (preferred pricing}
Product Code: AFL1G-CA
Amsoil Absolute Efficiency Oil Filter
Each: $12.95 (preferred pricing)
Product Code: EA15K50-EA
You may want to also replace the OEM engine oil drain plug with a
magnetic plug to capture any suspended or settled particles. Mine didn't come with one. Differential already has one.
[Differential]
I changed out the gear oil in the diff at about 600, 800, 1000, and 1200 miles, then about every 2 or 3 drag strip visits, or about 16-24 passes. HP Supplement says to change it after every competitive event. I take that to mean road course day. I use the listed GM lubricant because I couldn't find anything better that has the same friction modifiers in it. You need those for the eLSD to work properly. A small amount of fine metal filings is normal at the start of your drain but you should not see any flakes or chunks.
I've been getting mine from Amazon. If you'll be doing it yourself, you'll want to get this suction gun too. It doesn't leak and lets you see exactly how much fluid is left.
$17.88 ea.
ACDelco 10-4034 Dexron LS 75W-90 Gear Oil - 32 oz
$22.75 ea.
Plews 30-740 UltraView Suction Gun with Red Tube Ends
[Warning]
Please have them check for chaffing lines on right (passenger) side rear, above differential. I found some on my last safety inspection in December. With such low mileage it may not have rubbed much yet. Definitely want to wrap those lines though. See this post for details:
Possible fuel lines rubbing under the car
--Cal