Rep Power: 648

hey canadian tire recently had a sale on castrol syntec synthetic oilds ranging from 5w30 to 5w50 ... in the rush of excitement i bought the 5w50 and did an oil change, i didnt relize it was 5w50 after i dropped it in. i havent heard vtec kick in for a while so the other day i slammed my gas pedal in to hear it kick in @ around 5k rpm.....no change in engine tone....whats going on there? did the oil affect it? doesnt vtec go through some test and one of them being oil pressure?

 
Rep Power: 671

so what ur vtec doesnt work at all?

 
Rep Power: 733

it kicks in at 5500 on a d16.

 
Rep Power: 655

you do have a intake right because its alllllooottt easier hearing vtec. with the b16 and d16 the stock intake was aseptically made to make the car alot less loud. thats why i got a aem v2 in my b16a2, now i can hear it like crazy.

 
Rep Power: 648

yea, i got and aftermarket one

 
Rep Power: 655

you have hit vtec before right without slaming the gas pedle? you might wont to drive normally but just dont swich gears{if its manual].

 
Rep Power: 671

ya but if uve got a bent valve and or fuked up springs or something not working properly in the mechanical assembly...vtec wont work, that comp knows somethings wrong and wont let vtec engage. do u have a check engine light?

 
Rep Power: 691

i put in 5w50 in my b16a2 it asks for 5w30 but mobile1 was on sale so i just grabbed it anyways, but my vtech is working perfectly fine, maybe its just a coincidence something else probably went wrong around the same time

 
Rep Power: 646

i don't think different grades of oil make any difference

 
Rep Power: 644

The age old question synthetic or conventional, if your car has low k's then u can go synthetic and have no problems and better motor condition, if u have higher k's stick with conventional because switching to synthetic may cause problems internally.

I have heard and read some articles that state using conventional oil and regular gas (87 octane) is best for Honda's, there have actually been situations where switching to synthetic and high octane fuel have decreased hp by up to 5 hp.

 
Rep Power: 648

A bent valve? are you kidding? He would have alot more problems then just his Vtec not working.

Have you check all the electrical connections under the hood,you may have inadvertantly knocked something loose or completly disconnected. I don't see why oil viscosity would matter unless you've got lots of miles on it, you might have some blow-by.

Good Luck

 
Rep Power: 764

A friends of my h22 was burning oil after he switched to synthetic, even after i told him not too. He had 115,000km on it.And i feel the power decrease after i put in 92 octane rather than the recommended 87.So yeah, wanting to put better than actually recommended hurts performance.

 
Rep Power: 670

honda sells their own oil

 
Rep Power: 682

if u switch to too good of a oil on a older car it could wash away some of the crap thats helping your car run smoothly now.try not to switch brands and thicknesses alot.

 
Rep Power: 682

Check the Vtec Solenoid