15W40 Heaven!
#55
JK Super Freak
I use to have a Nissan Xterra, everytime I changed the oil, the engine was much responsive. a month later not even 500 miles after the oil and filter change, the performance went down. I have not noticed this on our Wranglers' but it does exists on some vehicles. Later I learned from a Nissan Mechanic that the engine I had in the Xterra , was a high Compression engine that broke down the oil very quickly. The new oil would be jet black within a month. Did not keep it long enough to say if it had issues later on. Should have switched to a quality synthetic oil.
I myself am switching from 5w-20 to 5w-30 weight. Currently using Mobil 1 Advanced Synthetic oil and a Napa Gold Oil Filter made by WIX, since switching to a Synthetic oil 8 months ago, I have seen a major difference on how my engine sounds better , longer time before dry starts,etc.
I do have one question though,, What is the true meaning of the first number ex: 5w labeled on motor oil. I thought it was the weight of the oil's viscosity referred to when the engine is first started, then the last 2 digits meant "IE: 20 or 30" took over when the oil is warmed up form idiling and now is reaching the higher end of the oil's operating characteristics under varying conditions,, temperature, towing, long idle, large hills, etc. Is this correct in a non technical way? lol.
Thanks,
*** SKULL_FACE ***
I myself am switching from 5w-20 to 5w-30 weight. Currently using Mobil 1 Advanced Synthetic oil and a Napa Gold Oil Filter made by WIX, since switching to a Synthetic oil 8 months ago, I have seen a major difference on how my engine sounds better , longer time before dry starts,etc.
I do have one question though,, What is the true meaning of the first number ex: 5w labeled on motor oil. I thought it was the weight of the oil's viscosity referred to when the engine is first started, then the last 2 digits meant "IE: 20 or 30" took over when the oil is warmed up form idiling and now is reaching the higher end of the oil's operating characteristics under varying conditions,, temperature, towing, long idle, large hills, etc. Is this correct in a non technical way? lol.
Thanks,
*** SKULL_FACE ***
All oil thins out as temperature rises, some thins less than others so a 5W-30 is still thinner at 100C (212F) than it was cold, it just doesn't thin as much as a 5 weight does so at the higher temperature it is as good as a 30 weight oil - the real beauty is with the higher operating temperatures on the engines today the 5W-30 is BETTER than the 30W at temperatures above 100C and still allows easier starting when cold.
Last edited by zstairlessone; 06-01-2012 at 01:00 PM.
#56
Originally Posted by zstairlessone
the real beauty is with the higher operating temperatures on the engines today the 5W-30 is BETTER than the 30W at temperatures above 100C and still allows easier starting when cold.
#57
JK Super Freak
Oh the 100C the C is centigrade which is the same as 212 F
#60
JK Newbie
Join Date: May 2012
Location: Washington, PA
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