5W20 in engines calling for 5W30
- Thread starter farrarfan1
- Start date
- Status
It couldn't be, the 4 ball test wasn't listed first.
I appreciate our Amsoil sponsers too, they are very unlike most of the Amsoil 'droids I have run across online.
I didn't see any evidence that this was an "Amsoil" website, but it did have an accurate, user-friendly description of HTHS, which is the SOLE reason I linked to same for the benefit of Farrarfan1:
"This test is representative of the conditions encountered in the bearings of automotive engines in severe service. Lubricants with high scores, such as premium synthetics, maintain their viscosity in high temperatures after exposure to high shear. This means that they continue to protect bearings even after exposure to severe service conditions."
http://www.bestchoice-car-care.com/american-society-for-testing-and-materials.html
...Comments which are mirrored by Shaeffer Oil: "Excellent high temperature/high shear performance to provide excellent oil film thickness and engine protection at high operating temperatures and shear rates, while minimizing lubricant frictional resistance."
http://66.102.7.104/search?q=cache:...ure+high+shear+rate+HTHS+motor+oil+4683&hl=en
"This test is representative of the conditions encountered in the bearings of automotive engines in severe service. Lubricants with high scores, such as premium synthetics, maintain their viscosity in high temperatures after exposure to high shear. This means that they continue to protect bearings even after exposure to severe service conditions."
http://www.bestchoice-car-care.com/american-society-for-testing-and-materials.html
...Comments which are mirrored by Shaeffer Oil: "Excellent high temperature/high shear performance to provide excellent oil film thickness and engine protection at high operating temperatures and shear rates, while minimizing lubricant frictional resistance."
http://66.102.7.104/search?q=cache:...ure+high+shear+rate+HTHS+motor+oil+4683&hl=en
I've been in the process of changing over to a new computer so I sorta fell behind on this posting. Seems like some good cases can be made on either side of the fence on this issue.I had heard or read somewhere that Chrysler was going to start recomending 5w20 in 2005. Since Ford ended up back spec'ing vehicles it seemed natural that Chrysler might do it also. I was just surprised at the response that it would result in poor gas mileage. Thanks for all the responses from the members of this great forum
. I'm gonna stick with 5w30 for now.
- Status