jaguar s-type 4.0L oil recommendation

[Iain]

quote:

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Hi, Im new to this site but so far have found this site very helpful. 9 months ago I purchased this veh with 65K miles on odometer. I am wondering if any other members have recommendations on what oil to use. Owners manual advises to use 0w30 ,5w30 or 10w40 in hot climates. Veh currently has 75K miles and I have performed 2 OCIs so far. first I used Amsoil 5w30 for 9k miles with no problems and last week I changed fuel filter which I noticed was pretty clogged and also switched to GC for the oil. Everything fine on day 1 but on day 2, I filled up with Citgo gasoline 93 octane and noticed a hesitation at idle. I am not sure if I have bad gas or if it is related to new fuel filter(not sure how), or if it is possibly the German Castrol(again not sure how). Any advice or suggestions?

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Excellent car! Eventually, I plan to own an S-Type R.

GC are excellent oil choice. Problem seem down to choice of fuel. Consider BP/Amoco Ultimate 93 or one of Top Tier fuels such as Shell V-Power:
http://www.toptiergas.com/index.html

I would never consider Citgo fuels for that car.

 

[dlafoy]

thanks for advise so far. I plan on adding gas treatment later today as I am also leaning toward bad gas being the culprit.

 

[dlafoy]

Hi, Im new to this site but so far have found this site very helpful. 9 months ago I purchased this veh with 65K miles on odometer. I am wondering if any other members have recommendations on what oil to use. Owners manual advises to use 0w30 ,5w30 or 10w40 in hot climates. Veh currently has 75K miles and I have performed 2 OCIs so far. first I used Amsoil 5w30 for 9k miles with no problems and last week I changed fuel filter which I noticed was pretty clogged and also switched to GC for the oil. Everything fine on day 1 but on day 2, I filled up with Citgo gasoline 93 octane and noticed a hesitation at idle. I am not sure if I have bad gas or if it is related to new fuel filter(not sure how), or if it is possibly the German Castrol(again not sure how). Any advice or suggestions?

 

[hominid7]

Changing the fuel filter and the recent change here in TX over to the "summer blend" of gas might have made a small difference at idle. I would be very surprised if your oil made any difference. GC 0w30 might be thicker than amsoil 5w30, but i would not think that would affect the idle.

You might try disconnecting the battery for 30 minutes and allowing the computer to reset. This might help compensate for the recent 1-2 punch to the fuel system. Also try a bottle of valvoline synthetic GAS treatment in your tank.