Find Your Make and Model
Auto Repair Menu
Auto Repair Q&A
Popular
- How to drive stick
- Transmission Repair
- Engine Repair
- Air Conditioning Repair
- Alternator Repair
- Timing Belt Replacement
- Cooling System Repair
- Spark Plug Replacement
- Brakes Repair
Engine
- Camshaft Repair
- Blower Motor Repair
- Carburetor Repair
- Choke Repair
- Engine Valve Repair
- Gas Tank Repair
- Head Gasket Repair
- Intake Repair
- Spark Plug Replacement
- Timing Adjustment
- Timing Belt Replacement
Cooling System
Brakes
- ABS Repair
- Brake Light Replacement
- Brake Pad Replacement
- Brake Replacement
- Brakes Repair
- Disc Brake Repair
- Drum Brake Replacement
- Resurface Rotors
Suspension
- Axle Repair
- Bearing Repair
- Bushings Repair
- CV Joint Repair
- Power Steering Rack Repair
- Steering Repair
- Steering Wheel Repair
- Suspension Repair
- Tire Repair
- Tire Replacement
- Wheel Bearing Replacement
Transmission
- Clutch Bleeding
- Clutch Repair
- Clutch Replacement Transmission Repair
- Transmission Service Cost
- Automatic Transmission Flush
- Auto Transmission Fluid
Exhaust/Emissions
Electrical
- Alternator Repair
- Car Battery Replacement
- Charging System Repair
- Electrical System Repair
- Fuse Repair
- Starter Repair
- Starter Wiring
Body
- Auto Touch Up Paint
- Paint Chip Repair
- Window Tint Film
- Windshield Repair
- Replacement Trunk Beds
- Rear View Mirror Replacement
Interior
- Auto Interior Repair
- Dash Repair
- Headliner Replacement
- Interior Door Panel Replacement
- Car Audio Repair
- Speedometer Calibration
- Speedometer Repair
Understand
- Auto Repair
- Auto Repair Manuals
- Diagnose Auto Problems
- Auto Maintenance
- Auto Performance
- Auto How To
Directory
Auto Repair Products
I have a 2000 jeep grand cherokee Limited, V8. I added a oil additive and there is now a mustard yellow film on the inside of the fill port. Would the additive cause this or is ther something else going on. Antifreeze level is normal and there appears to
Online Auto Repair Manuals
ALLDATAdiy.com is easy to use and contains all of the original manufacture’s repair, diagnostic and repair procedures. Easy to use navigation and search tools allow you to quickly get to the info you need to do the job. Hyperlinks insure that you can get to related info at the push of a button. Shop Our Products - Click Here!
Auto Repair Q&A Contest
Win Cash!
Participate in the 10w40.com Q&A community to win cash prizes!
Congratulations to our April Winners!
- 1st Place: Big Block 409
- 2nd Place bfree
- 3rd Place jerryh20
How To Play
Top Contributors: 2 weeks
| User | Points |
|---|---|
| Big Block 409 | 335 |
| jerryh20 | 110 |
| Tenspeed | 100 |
| Help me please | 55 |
| davemaddock | 25 |



what kind of additive?
what kind of additive?
Lucas
Lucas
lucas
lucas
check the pcv system if it's
check the pcv system if it's not working right you'll get moisture build up that may be causing it.
lucas may foam a bit in hot oil, but no flimming.
Will do, thanks for the help.
Will do, thanks for the help.
let us know what you find.
let us know what you find.