Spectro Answers Your Oil Questions

spectrooils2Question 1:  Can I mix viscosity grades?
Spectro Answer: Yes, you can and no harm will be done. Topping up with 10w40, if its all you have available, will not injure the 20w50 in your crankcase. It will, however, lower the overall viscosity of your crankcase oil to a certain extent. This will cause no harm to your motorcycle. Likewise, adding a 20w50 product to 10w40 will slightly increase the overall viscosity in your crankcase. Again, no harm will occur.

Question 2:  Can you explain multi-weight lubricants, so here an explanation in one short paragraph.
Spectro Answer: A multi-weight oil is an oil formulation that acts as if it has two different viscosities, depending on the temperature. At the lower test temperature (40C), it flows as the first number would indicate, and at the higher test temperature (100C), it flows as the second number would indicate. This multi-weight nature is made possible by the addition of long-chain polymers to the oil, which are coiled up when cold, but straighten out when hot, and thus change the flow characteristics of the oil. Thus a 10w40 oil will flow like a 10 weight oil when at 40C (fairly thin), but will not thin out more than a 40 weight oil would when hot (100C).

Question 3: My dealer says I have to use the OEM lubricant in my motorcycle or my warranty is void.
Spectro Answer: This is not true and may, in fact, be illegal. Have the dealer put this in writing on his letterhead. We doubt he will. All you need to do to fulfill your warranty requirements is to use a lubricant that meets or exceeds the OEM specifications. Spectro products meet or exceed all manufacturers performance requirements.

More questions? Email them to me at editor@cyrilhuzeblog.com and I will publish Spectro Oils answers.

4 Responses to “Spectro Answers Your Oil Questions”

  1. 1 Cade Jun 3rd, 2009 at 7:55 am

    I for one can appreciate Spectro for answering questions. Question 3: We all know that this is the typical Harley dealerships warning people about buying other oils. Screw them.

  2. 2 ROGUE Jun 3rd, 2009 at 3:14 pm

    I started off using Spectro engine oil and was very happy with it. I then went to their 6 Speed Transmission Fluid in my 5 speed. Yea I know it says for 6 speed but works great in 5 speeds as well.
    I also use their primary fluid, brake fluid and just recenty some of their polish in a spray can. worked great
    No I do not know why a oil company makes and or sells polish LOL
    I suggest you try some and see if you are as satisfied with it as I am

  3. 3 Rodent Jun 3rd, 2009 at 7:08 pm

    Is anybody unhappy with any nationally brand oil? I only hear how people rave about oils performance…Remember TEXACO StarPower, EXON’s put a tiger in your tank! gas is gas as long as octane numbers are correct and oil is oil jus read the SAE Codes on top of the can and use the correct SAE code required for your engine…

  4. 4 nicker Jun 6th, 2009 at 10:25 pm

    “…and oil is oil just read the SAE Codes on top of the can…”

    OK, but how bout additives in the oil.
    Are any better with roller bearings ….???


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Cyril Huze