Sayed Ahmed

On what basis does the manufacturer recommend a specific grade of Engine oil to us?

My manufacturer knows best about my engine but if I use 15w50 against 20w50 is it alright?

My rear tyre has worn down nearly to the wear limit , but my front tyre has more than adequate tread.

I was thinking If I should replace the front ones to the back and rear to the front?

I can buy a new tyre but just curious if I put a nearly worn tyre on the front and ride without and hazard's?

Does front end need more grip or rear on a motorcycle/scooter?

I recently stumbled upon ways to drive fuels from various sources.

For example,

By Plastic

Biodiesel , Plant Matter

Tire Derived Fuels

We know that Petroleum based fuels pollute but these Alternative fuels pollute less.

Why don t these techniques not come into mass production when we clearly transition to these cleaner and greener methods?

I know that the more thread depth and groove the more water displacing capability .

But why does a tire with similar groove/thread depth slip on loose sand?

My Motorcycle has an O ring chain , they say that o ring chains are internally lubricated and sealed.

So why do we need to lube it externally and what exactly are we trying to lube and what happens if we don't?

Thanks in Advance.

Tried many kinds of Chain lubes , but they see to fly off and vanish well before 500 miles

Will a normal bearing grease do the lubing job well as compared to a Chain Lube?

My Motorcycle Manufacturer recommends using 20w50 oil , can I use 15w40 Viscosity?

PS : Don t Tell me to stick with what manufacturer recommends , I am just curious if I can change the Viscosity.

Thanks.

Consider two cars : A and B

Car A is 600 BHP and its weight is 2340 KG

Car B is 534 BHP and weighs 2100 KG

Which car would accelerate quicker in a straight line ?

Simply , if I know BHP and weight of any two car is it possible to know which of them is more quick in acceleration?

I have a Nikon D3100 with standard 18-55mm VR kit lens , My camera is 14.2 megapixels but when I shoot even at daylight with about ISO 400 or 800(Not above that) I don't see enough details and I find noise when I try to zoom into the picture although the sharpness is excellent but I find more noise when I zoom.

But I once had my friends AF-S 55-200mm VR , with the same conditions under daylight at ISO 400 or 800 I find better details and when zoom in I don't get much noise as compared to my kit lens.

I find that all my settings are fine with noise reduction switched on.

I once heard that Nikon d3100 can handle pretty well up to ISO 800.

My question :- Am I doing something wrong by increasing iso up to 400 or 800?

Or

Is my Nikon d3100 not that capable of handling this much ISO?

Or

Is my lens not that capable?

Now I know that some people will say that try to keep iso less as possible but there are some times in the day when we may need to boost ISO a bit.

Thank you!

I have a Nikon D3100 with standard 18-55mm VR kit lens , My camera is 14.2 megapixels but when I shoot even at daylight with about ISO 400 or 800(Not above that) I don't see enough details and I find noise when I try to zoom into the picture although the sharpness is excellent but I find more noise when I zoom.

But I once had my friends AF-S 55-200mm VR , with the same conditions under daylight at ISO 400 or 800 I find better details and when zoom in I don't get much noise as compared to my kit lens.

I find that all my settings are fine with noise reduction switched on.

I once heard that Nikon d3100 can handle pretty well up to ISO 800.

My question :- Am I doing something wrong by increasing iso up to 400 or 800?

Or

Is my Nikon d3100 not that capable of handling this much ISO?

Or

Is my lens not that capable?

Now I know that some people will say that try to keep iso less as possible but there are some times in the day when we may need to boost ISO a bit.

Thank you!

I have just download the game from the website and I wanted the activation key , crack or something like that.

There are some links but they have surveys which I hate the most , I live in UAE so dealing with surveys is difficult.

So , if anyone has the activation key or any link please help me or if you are so kind please complete any survey and send me the activation key.

Thamkyou.

Today morning I noticed some dust particles in the viewfinder , how do I get rid of them?

I'm considering getting the Benro T880ex tripod and wanted to know whether it is strong enough to handle my Nikon D3100 with 18-55mm vr , 55-200 vr and 18-105mm vr ?

What are your thoughts on this Tripod?

Im considering getting a Yongnuo 560ii for my Nikon d3100.

I heard that it is a totally manual flash , how can I fire it when I release my shutter button from the camera? Do I need to get something else for this?

When i convert my RAW images to JPEG my images gets too noisy.

Does this happen to you guys?

I shoot RAW and when i edit my pictures and convert them to JPEG my images gets too noisy.

I wanted to ask that :-

Do we need to convert to JPEG before editing ? or something else to get rid of that noise.

Please help me out.

I have a panhead tripod and when it was new it was very tight and now after using it for some time most of the bolts got loose.

If i try to tighten it it does not and the bolts keeps on rotating 360 degrees and never gets tightened.

Anyone out there who can help me figure this out?

Is it something to do with how much elements and groups are present?

For example if a lens has 11 elements in 8 groups (Nikkor 18-55mm VR) and another lens 15 elements in 11 groups (Nikkor 55-200mm VR ED) which would be sharper?

Is it the lens with more elements sharper or the lens with less element sharper?