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Is it necessary to replace the engine oil and filter after the engine has overheated? After visiting my daughter this weekend at her college, one of my radiator hoses broke while I was on the highway heading back home. When I noticed that the temperature gauge had reached the high mark, I...

Here is a VOA for Amsoil Severe Gear 75W-90 from WearCheck. Most elemental analysis figures are in parts per million (ppm) by mass. Code: AMSOIL SVG CONTAMINANT 75W-90 Silicon 14 Potassium 7.6 Sodium 1.0 Fuel (%) Glycol --...

From Walmart, I recently purchased engine oil produced by Green Earth Technologies: G-Oil SAE 5W-30 Green Bio-Based Full Synthetic Motor OIL API SM. It is unique in that it is made not from petroleum but rather from animal fat. Green Earth Technologies claims that its oil is “Not classified as...

Yellow-metal friendly GL-4 gear lubes are often specified for the manual transmissions and transfer cases of legacy autos. On the theory that lubricants with boron additives are less corrosive to yellow metals, I decided to submit the following transmission fluid and GL-5 gear oil for virgin oil...

The Copper Strip Tarnish Test (ASTM D130-10) is a standard test of a lubricant to indicate how corrosive it is to copper alloys that may be in a transmission. My restored 1989 Suzuki Sidekick has brass synchromesh transmission components that may be vulnerable to additives found in many GL5...

On the web, I’ve found two laboratories that will perform a sulfur content analysis for $30. They are: www.huffmanlabs.com www.microana.com Has anyone dealt with them? Can anyone recommend other laboratories that can provide a reliable and economical sulfur content analysis? Thank you!

I’ve found a used Suzuki manual transmission and transfer case with only 18,000 miles of use. I’m told that these two gear boxes have been sitting in storage for the last decade or two. I've just installed them in my restoration project, a 1989 Sidekick. I believe that the transmission and...